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[wxWidgets.git] / src / msw / treectrl.cpp
diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp
index 9e8c7e31d1e158ad86ef1dd8c3e46768bae477cc..191a26fc00a3d259728dd7443bb8cfb112553e18 100644 (file)
--- a/src/msw/treectrl.cpp
+++ b/src/msw/treectrl.cpp
@@ -40,12 +40,9 @@
 #include "wx/dynlib.h"
 #include "wx/msw/private.h"
 
 #include "wx/dynlib.h"
 #include "wx/msw/private.h"
 
-// Set this to 1 to be _absolutely_ sure that repainting will work for all
-// comctl32.dll versions
-#define wxUSE_COMCTL32_SAFELY 0
-
 #include "wx/imaglist.h"
 #include "wx/msw/dragimag.h"
 #include "wx/imaglist.h"
 #include "wx/msw/dragimag.h"
+#include "wx/msw/uxtheme.h"
 
 // macros to hide the cast ugliness
 // --------------------------------
 
 // macros to hide the cast ugliness
 // --------------------------------
@@ -80,20 +77,28 @@ typedef struct tagNMTVITEMCHANGE
 // The vista tree control includes some new code that originally broke the
 // multi-selection tree, causing seemingly spurious item selection state changes
 // during Shift or Ctrl-click item selection. (To witness the original broken
 // The vista tree control includes some new code that originally broke the
 // multi-selection tree, causing seemingly spurious item selection state changes
 // during Shift or Ctrl-click item selection. (To witness the original broken
-// behavior, simply make IsLocked() below always return false). This problem was
+// behaviour, simply make IsLocked() below always return false). This problem was
 // solved by using the following class to 'unlock' an item's selection state.
 
 class TreeItemUnlocker
 {
 public:
     // unlock a single item
 // solved by using the following class to 'unlock' an item's selection state.
 
 class TreeItemUnlocker
 {
 public:
     // unlock a single item
-    TreeItemUnlocker(HTREEITEM item) { ms_unlockedItem = item; }
+    TreeItemUnlocker(HTREEITEM item)
+    {
+        m_oldUnlockedItem = ms_unlockedItem;
+        ms_unlockedItem = item;
+    }
 
     // unlock all items, don't use unless absolutely necessary
 
     // unlock all items, don't use unless absolutely necessary
-    TreeItemUnlocker() { ms_unlockedItem = (HTREEITEM)-1; }
+    TreeItemUnlocker()
+    {
+        m_oldUnlockedItem = ms_unlockedItem;
+        ms_unlockedItem = (HTREEITEM)-1;
+    }
 
     // lock everything back
 
     // lock everything back
-    ~TreeItemUnlocker() { ms_unlockedItem = NULL; }
+    ~TreeItemUnlocker() { ms_unlockedItem = m_oldUnlockedItem; }
 
 
     // check if the item state is currently locked
 
 
     // check if the item state is currently locked
@@ -102,6 +107,9 @@ public:
 
 private:
     static HTREEITEM ms_unlockedItem;
 
 private:
     static HTREEITEM ms_unlockedItem;
+    HTREEITEM m_oldUnlockedItem;
+
+    wxDECLARE_NO_COPY_CLASS(TreeItemUnlocker);
 };
 
 HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL;
 };
 
 HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL;
@@ -134,6 +142,32 @@ private:
 // private functions
 // ----------------------------------------------------------------------------
 
 // private functions
 // ----------------------------------------------------------------------------
 
+namespace
+{
+
+// Work around a problem with TreeView_GetItemRect() when using MinGW/Cygwin:
+// it results in warnings about breaking strict aliasing rules because HITEM is
+// passed via a RECT pointer, so use a union to avoid them and define our own
+// version of the standard macro using it.
+union TVGetItemRectParam
+{
+    RECT rect;
+    HTREEITEM hItem;
+};
+
+inline bool
+wxTreeView_GetItemRect(HWND hwnd,
+                       HTREEITEM hItem,
+                       TVGetItemRectParam& param,
+                       BOOL fItemRect)
+{
+    param.hItem = hItem;
+    return ::SendMessage(hwnd, TVM_GETITEMRECT, fItemRect,
+                        (LPARAM)&param) == TRUE;
+}
+
+} // anonymous namespace
+
 // wrappers for TreeView_GetItem/TreeView_SetItem
 static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
 {
 // wrappers for TreeView_GetItem/TreeView_SetItem
 static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
 {
@@ -416,14 +450,18 @@ public:
             switch ( which )
             {
                 case wxTreeItemIcon_SelectedExpanded:
             switch ( which )
             {
                 case wxTreeItemIcon_SelectedExpanded:
-                    image = GetImage(wxTreeItemIcon_Expanded);
+                    // We consider that expanded icon is more important than
+                    // selected so test for it first.
+                    image = m_images[wxTreeItemIcon_Expanded];
+                    if ( image == -1 )
+                        image = m_images[wxTreeItemIcon_Selected];
                     if ( image != -1 )
                         break;
                     //else: fall through
 
                 case wxTreeItemIcon_Selected:
                 case wxTreeItemIcon_Expanded:
                     if ( image != -1 )
                         break;
                     //else: fall through
 
                 case wxTreeItemIcon_Selected:
                 case wxTreeItemIcon_Expanded:
-                    image = GetImage(wxTreeItemIcon_Normal);
+                    image = m_images[wxTreeItemIcon_Normal];
                     break;
 
                 case wxTreeItemIcon_Normal:
                     break;
 
                 case wxTreeItemIcon_Normal:
@@ -601,72 +639,6 @@ private:
 // wxWin macros
 // ----------------------------------------------------------------------------
 
 // wxWin macros
 // ----------------------------------------------------------------------------
 
-#if wxUSE_EXTENDED_RTTI
-WX_DEFINE_FLAGS( wxTreeCtrlStyle )
-
-wxBEGIN_FLAGS( wxTreeCtrlStyle )
-    // new style border flags, we put them first to
-    // use them for streaming out
-    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
-    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
-    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
-    wxFLAGS_MEMBER(wxBORDER_RAISED)
-    wxFLAGS_MEMBER(wxBORDER_STATIC)
-    wxFLAGS_MEMBER(wxBORDER_NONE)
-
-    // old style border flags
-    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
-    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
-    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
-    wxFLAGS_MEMBER(wxRAISED_BORDER)
-    wxFLAGS_MEMBER(wxSTATIC_BORDER)
-    wxFLAGS_MEMBER(wxBORDER)
-
-    // standard window styles
-    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
-    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
-    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
-    wxFLAGS_MEMBER(wxWANTS_CHARS)
-    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
-    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
-    wxFLAGS_MEMBER(wxVSCROLL)
-    wxFLAGS_MEMBER(wxHSCROLL)
-
-    wxFLAGS_MEMBER(wxTR_EDIT_LABELS)
-    wxFLAGS_MEMBER(wxTR_NO_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_HAS_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_TWIST_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_NO_LINES)
-    wxFLAGS_MEMBER(wxTR_FULL_ROW_HIGHLIGHT)
-    wxFLAGS_MEMBER(wxTR_LINES_AT_ROOT)
-    wxFLAGS_MEMBER(wxTR_HIDE_ROOT)
-    wxFLAGS_MEMBER(wxTR_ROW_LINES)
-    wxFLAGS_MEMBER(wxTR_HAS_VARIABLE_ROW_HEIGHT)
-    wxFLAGS_MEMBER(wxTR_SINGLE)
-    wxFLAGS_MEMBER(wxTR_MULTIPLE)
-#if WXWIN_COMPATIBILITY_2_8
-    wxFLAGS_MEMBER(wxTR_EXTENDED)
-#endif
-    wxFLAGS_MEMBER(wxTR_DEFAULT_STYLE)
-
-wxEND_FLAGS( wxTreeCtrlStyle )
-
-IMPLEMENT_DYNAMIC_CLASS_XTI(wxTreeCtrl, wxControl,"wx/treectrl.h")
-
-wxBEGIN_PROPERTIES_TABLE(wxTreeCtrl)
-    wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
-    wxEVENT_RANGE_PROPERTY( TreeEvent , wxEVT_COMMAND_TREE_BEGIN_DRAG , wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK , wxTreeEvent )
-    wxPROPERTY_FLAGS( WindowStyle , wxTreeCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
-wxEND_PROPERTIES_TABLE()
-
-wxBEGIN_HANDLERS_TABLE(wxTreeCtrl)
-wxEND_HANDLERS_TABLE()
-
-wxCONSTRUCTOR_5( wxTreeCtrl , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
-#else
-IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl)
-#endif
-
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
@@ -694,8 +666,8 @@ static /* const */ wxEventType gs_expandEvents[IDX_WHAT_MAX][IDX_HOW_MAX];
    but logically it's a const table with the following entries:
 =
 {
    but logically it's a const table with the following entries:
 =
 {
-    { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, wxEVT_COMMAND_TREE_ITEM_COLLAPSING },
-    { wxEVT_COMMAND_TREE_ITEM_EXPANDED,  wxEVT_COMMAND_TREE_ITEM_EXPANDING  }
+    { wxEVT_TREE_ITEM_COLLAPSED, wxEVT_TREE_ITEM_COLLAPSING },
+    { wxEVT_TREE_ITEM_EXPANDED,  wxEVT_TREE_ITEM_EXPANDING  }
 };
 */
 
 };
 */
 
@@ -754,10 +726,10 @@ void wxTreeCtrl::Init()
 
     // initialize the global array of events now as it can't be done statically
     // with the wxEVT_XXX values being allocated during run-time only
 
     // initialize the global array of events now as it can't be done statically
     // with the wxEVT_XXX values being allocated during run-time only
-    gs_expandEvents[IDX_COLLAPSE][IDX_DONE] = wxEVT_COMMAND_TREE_ITEM_COLLAPSED;
-    gs_expandEvents[IDX_COLLAPSE][IDX_DOING] = wxEVT_COMMAND_TREE_ITEM_COLLAPSING;
-    gs_expandEvents[IDX_EXPAND][IDX_DONE] = wxEVT_COMMAND_TREE_ITEM_EXPANDED;
-    gs_expandEvents[IDX_EXPAND][IDX_DOING] = wxEVT_COMMAND_TREE_ITEM_EXPANDING;
+    gs_expandEvents[IDX_COLLAPSE][IDX_DONE] = wxEVT_TREE_ITEM_COLLAPSED;
+    gs_expandEvents[IDX_COLLAPSE][IDX_DOING] = wxEVT_TREE_ITEM_COLLAPSING;
+    gs_expandEvents[IDX_EXPAND][IDX_DONE] = wxEVT_TREE_ITEM_EXPANDED;
+    gs_expandEvents[IDX_EXPAND][IDX_DOING] = wxEVT_TREE_ITEM_EXPANDING;
 }
 
 bool wxTreeCtrl::Create(wxWindow *parent,
 }
 
 bool wxTreeCtrl::Create(wxWindow *parent,
@@ -806,30 +778,32 @@ bool wxTreeCtrl::Create(wxWindow *parent,
     if ( !MSWCreateControl(WC_TREEVIEW, wstyle, pos, size) )
         return false;
 
     if ( !MSWCreateControl(WC_TREEVIEW, wstyle, pos, size) )
         return false;
 
-#if wxUSE_COMCTL32_SAFELY
-    wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-    wxWindow::SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
-#elif 1
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
-#else
-    // This works around a bug in the Windows tree control whereby for some versions
-    // of comctrl32, setting any colour actually draws the background in black.
-    // This will initialise the background to the system colour.
-    // THIS FIX NOW REVERTED since it caused problems on _other_ systems.
-    // Assume the user has an updated comctl32.dll.
-    ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0,-1);
-    wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-    SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
-#endif
 
     wxSetCCUnicodeFormat(GetHwnd());
 
 
     wxSetCCUnicodeFormat(GetHwnd());
 
+    if ( m_windowStyle & wxTR_TWIST_BUTTONS )
+    {
+        // Under Vista and later Explorer uses rotating ("twist") buttons
+        // instead of the default "+/-" ones so apply its theme to the tree
+        // control to implement this style.
+        if ( wxGetWinVersion() >= wxWinVersion_Vista )
+        {
+            if ( wxUxThemeEngine *theme = wxUxThemeEngine::GetIfActive() )
+            {
+                theme->SetWindowTheme(GetHwnd(), L"EXPLORER", NULL);
+            }
+        }
+    }
+
     return true;
 }
 
 wxTreeCtrl::~wxTreeCtrl()
 {
     return true;
 }
 
 wxTreeCtrl::~wxTreeCtrl()
 {
+    m_isBeingDeleted = true;
+
     // delete any attributes
     if ( m_hasAnyAttr )
     {
     // delete any attributes
     if ( m_hasAnyAttr )
     {
@@ -943,24 +917,20 @@ size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 
 bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour)
 {
 
 bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour)
 {
-#if !wxUSE_COMCTL32_SAFELY
     if ( !wxWindowBase::SetBackgroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel());
     if ( !wxWindowBase::SetBackgroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel());
-#endif
 
     return true;
 }
 
 bool wxTreeCtrl::SetForegroundColour(const wxColour &colour)
 {
 
     return true;
 }
 
 bool wxTreeCtrl::SetForegroundColour(const wxColour &colour)
 {
-#if !wxUSE_COMCTL32_SAFELY
     if ( !wxWindowBase::SetForegroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel());
     if ( !wxWindowBase::SetForegroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel());
-#endif
 
     return true;
 }
 
     return true;
 }
@@ -1000,7 +970,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
         return;
 
     wxTreeViewItem tvItem(item, TVIF_TEXT);
         return;
 
     wxTreeViewItem tvItem(item, TVIF_TEXT);
-    tvItem.pszText = (wxChar *)text.wx_str();  // conversion is ok
+    tvItem.pszText = wxMSW_CONV_LPTSTR(text);
     DoSetItem(&tvItem);
 
     // when setting the text of the item being edited, the text control should
     DoSetItem(&tvItem);
 
     // when setting the text of the item being edited, the text control should
@@ -1013,7 +983,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
     {
         if ( item == m_idEdited )
         {
     {
         if ( item == m_idEdited )
         {
-            ::SetWindowText(hwndEdit, text.wx_str());
+            ::SetWindowText(hwndEdit, text.t_str());
         }
     }
 }
         }
     }
 }
@@ -1271,14 +1241,10 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
     }
 
     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
     }
 
     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
-    RECT rect;
-
-    // this ugliness comes directly from MSDN - it *is* the correct way to pass
-    // the HTREEITEM with TVM_GETITEMRECT
-    *(HTREEITEM *)&rect = HITEM(item);
+    TVGetItemRectParam param;
 
     // true means to get rect for just the text, not the whole line
 
     // true means to get rect for just the text, not the whole line
-    if ( !::SendMessage(GetHwnd(), TVM_GETITEMRECT, true, (LPARAM)&rect) )
+    if ( !wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, TRUE) )
     {
         // if TVM_GETITEMRECT returned false, then the item is definitely not
         // visible (because its parent is not expanded)
     {
         // if TVM_GETITEMRECT returned false, then the item is definitely not
         // visible (because its parent is not expanded)
@@ -1288,7 +1254,7 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
     // however if it returned true, the item might still be outside the
     // currently visible part of the tree, test for it (notice that partly
     // visible means visible here)
     // however if it returned true, the item might still be outside the
     // currently visible part of the tree, test for it (notice that partly
     // visible means visible here)
-    return rect.bottom > 0 && rect.top < GetClientSize().y;
+    return param.rect.bottom > 0 && param.rect.top < GetClientSize().y;
 }
 
 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 }
 
 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
@@ -1521,7 +1487,7 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     if ( !text.empty() )
     {
         mask |= TVIF_TEXT;
     if ( !text.empty() )
     {
         mask |= TVIF_TEXT;
-        tvIns.item.pszText = (wxChar *)text.wx_str();  // cast is ok
+        tvIns.item.pszText = wxMSW_CONV_LPTSTR(text);
     }
     else
     {
     }
     else
     {
@@ -1561,9 +1527,10 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     // need this to make the "[+]" appear
     if ( firstChild )
     {
     // need this to make the "[+]" appear
     if ( firstChild )
     {
-        RECT rect;
-        TreeView_GetItemRect(GetHwnd(), HITEM(parent), &rect, FALSE);
-        ::InvalidateRect(GetHwnd(), &rect, FALSE);
+        TVGetItemRectParam param;
+
+        wxTreeView_GetItemRect(GetHwnd(), HITEM(parent), param, FALSE);
+        ::InvalidateRect(GetHwnd(), &param.rect, FALSE);
     }
 
     // associate the application tree item with Win32 tree item handle
     }
 
     // associate the application tree item with Win32 tree item handle
@@ -1675,11 +1642,11 @@ void wxTreeCtrl::Delete(const wxTreeItemId& item)
 
         if ( next.IsOk() )
         {
 
         if ( next.IsOk() )
         {
-            wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, next);
+            wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this, next);
 
             if ( IsTreeEventAllowed(changingEvent) )
             {
 
             if ( IsTreeEventAllowed(changingEvent) )
             {
-                wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, next);
+                wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED, this, next);
                 (void)HandleTreeEvent(changedEvent);
             }
             else
                 (void)HandleTreeEvent(changedEvent);
             }
             else
@@ -1772,7 +1739,7 @@ void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
 
     if ( IsExpanded(item) )
     {
 
     if ( IsExpanded(item) )
     {
-        wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_COLLAPSING,
+        wxTreeEvent event(wxEVT_TREE_ITEM_COLLAPSING,
                           this, wxTreeItemId(item));
 
         if ( !IsTreeEventAllowed(event) )
                           this, wxTreeItemId(item));
 
         if ( !IsTreeEventAllowed(event) )
@@ -1784,7 +1751,7 @@ void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
         if ( IsExpanded(item) )
             return;
 
         if ( IsExpanded(item) )
             return;
 
-        wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_COLLAPSED, this, item);
+        wxTreeEvent event(wxEVT_TREE_ITEM_COLLAPSED, this, item);
         (void)HandleTreeEvent(event);
     }
     //else: change didn't took place, so do nothing at all
         (void)HandleTreeEvent(event);
     }
     //else: change didn't took place, so do nothing at all
@@ -1825,7 +1792,7 @@ void wxTreeCtrl::Unselect()
 
     if ( HasFlag(wxTR_MULTIPLE) )
     {
 
     if ( HasFlag(wxTR_MULTIPLE) )
     {
-        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+        wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                   this, wxTreeItemId());
         changingEvent.m_itemOld = htFocus;
 
                                   this, wxTreeItemId());
         changingEvent.m_itemOld = htFocus;
 
@@ -1833,7 +1800,7 @@ void wxTreeCtrl::Unselect()
         {
             ClearFocusedItem();
 
         {
             ClearFocusedItem();
 
-            wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+            wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                      this, wxTreeItemId());
             changedEvent.m_itemOld = htFocus;
             (void)HandleTreeEvent(changedEvent);
                                      this, wxTreeItemId());
             changedEvent.m_itemOld = htFocus;
             (void)HandleTreeEvent(changedEvent);
@@ -1865,14 +1832,14 @@ void wxTreeCtrl::UnselectAll()
         HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
         if ( !htFocus ) return;
 
         HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
         if ( !htFocus ) return;
 
-        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this);
+        wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this);
         changingEvent.m_itemOld = htFocus;
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
             DoUnselectAll();
 
         changingEvent.m_itemOld = htFocus;
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
             DoUnselectAll();
 
-            wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this);
+            wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED, this);
             changedEvent.m_itemOld = htFocus;
             (void)HandleTreeEvent(changedEvent);
         }
             changedEvent.m_itemOld = htFocus;
             (void)HandleTreeEvent(changedEvent);
         }
@@ -1903,14 +1870,14 @@ void wxTreeCtrl::SelectChildren(const wxTreeItemId& parent)
 
     HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
 
 
     HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
 
-    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this);
+    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this);
     changingEvent.m_itemOld = htFocus;
 
     if ( IsTreeEventAllowed(changingEvent) )
     {
         DoSelectChildren(parent);
 
     changingEvent.m_itemOld = htFocus;
 
     if ( IsTreeEventAllowed(changingEvent) )
     {
         DoSelectChildren(parent);
 
-        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this);
+        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED, this);
         changedEvent.m_itemOld = htFocus;
         (void)HandleTreeEvent(changedEvent);
     }
         changedEvent.m_itemOld = htFocus;
         (void)HandleTreeEvent(changedEvent);
     }
@@ -1935,7 +1902,7 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
 
     if ( HasFlag(wxTR_MULTIPLE) )
     {
 
     if ( HasFlag(wxTR_MULTIPLE) )
     {
-        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+        wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this, item);
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
@@ -1947,7 +1914,7 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
                 SetFocusedItem(item);
             }
 
                 SetFocusedItem(item);
             }
 
-            wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+            wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                      this, item);
             (void)HandleTreeEvent(changedEvent);
         }
                                      this, item);
             (void)HandleTreeEvent(changedEvent);
         }
@@ -1966,25 +1933,27 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
             // leave itemNew invalid
         }
 
             // leave itemNew invalid
         }
 
-        // in spite of the docs (MSDN Jan 99 edition), we don't seem to receive
-        // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
-        // send them ourselves
-
+        // Recent versions of comctl32.dll send TVN_SELCHANG{ED,ING} events
+        // when we call TreeView_SelectItem() but apparently some old ones did
+        // not so send the events ourselves and ignore those generated by
+        // TreeView_SelectItem() if m_changingSelection is set.
         wxTreeEvent
         wxTreeEvent
-            changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, itemNew);
+            changingEvent(wxEVT_TREE_SEL_CHANGING, this, itemNew);
         changingEvent.SetOldItem(itemOld);
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
         changingEvent.SetOldItem(itemOld);
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
+            TempSetter set(m_changingSelection);
+
             if ( !TreeView_SelectItem(GetHwnd(), HITEM(itemNew)) )
             {
                 wxLogLastError(wxT("TreeView_SelectItem"));
             }
             else // ok
             {
             if ( !TreeView_SelectItem(GetHwnd(), HITEM(itemNew)) )
             {
                 wxLogLastError(wxT("TreeView_SelectItem"));
             }
             else // ok
             {
-                SetFocusedItem(item);
+                ::SetFocus(GetHwnd(), HITEM(item));
 
 
-                wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                          this, itemNew);
                 changedEvent.SetOldItem(itemOld);
                 (void)HandleTreeEvent(changedEvent);
                                          this, itemNew);
                 changedEvent.SetOldItem(itemOld);
                 (void)HandleTreeEvent(changedEvent);
@@ -2029,8 +1998,7 @@ void wxTreeCtrl::DeleteTextCtrl()
 
         m_textCtrl->UnsubclassWin();
         m_textCtrl->SetHWND(0);
 
         m_textCtrl->UnsubclassWin();
         m_textCtrl->SetHWND(0);
-        delete m_textCtrl;
-        m_textCtrl = NULL;
+        wxDELETE(m_textCtrl);
 
         m_idEdited.Unset();
     }
 
         m_idEdited.Unset();
     }
@@ -2039,7 +2007,7 @@ void wxTreeCtrl::DeleteTextCtrl()
 wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
                                   wxClassInfo *textControlClass)
 {
 wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
                                   wxClassInfo *textControlClass)
 {
-    wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
+    wxASSERT( textControlClass->IsKindOf(wxCLASSINFO(wxTextCtrl)) );
 
     DeleteTextCtrl();
 
 
     DeleteTextCtrl();
 
@@ -2051,8 +2019,7 @@ wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
     // returned false
     if ( !hWnd )
     {
     // returned false
     if ( !hWnd )
     {
-        delete m_textCtrl;
-        m_textCtrl = NULL;
+        wxDELETE(m_textCtrl);
         return NULL;
     }
 
         return NULL;
     }
 
@@ -2103,18 +2070,18 @@ bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
                                  wxRect& rect,
                                  bool textOnly) const
 {
                                  wxRect& rect,
                                  bool textOnly) const
 {
-    RECT rc;
-
     // Virtual root items have no bounding rectangle
     if ( IS_VIRTUAL_ROOT(item) )
     {
         return false;
     }
 
     // Virtual root items have no bounding rectangle
     if ( IS_VIRTUAL_ROOT(item) )
     {
         return false;
     }
 
-    if ( TreeView_GetItemRect(GetHwnd(), HITEM(item),
-                              &rc, textOnly) )
+    TVGetItemRectParam param;
+
+    if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, textOnly) )
     {
     {
-        rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
+        rect = wxRect(wxPoint(param.rect.left, param.rect.top),
+                      wxPoint(param.rect.right, param.rect.bottom));
 
         return true;
     }
 
         return true;
     }
@@ -2200,7 +2167,7 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
     //     may be why as if you don't use the DECLARE_CLASS/IMPLEMENT_CLASS
     //     combo for your derived wxTreeCtrl if will sort without
     //     OnCompareItems
     //     may be why as if you don't use the DECLARE_CLASS/IMPLEMENT_CLASS
     //     combo for your derived wxTreeCtrl if will sort without
     //     OnCompareItems
-    if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
+    if ( GetClassInfo() == wxCLASSINFO(wxTreeCtrl) )
     {
         TreeView_SortChildren(GetHwnd(), HITEM(item), 0);
     }
     {
         TreeView_SortChildren(GetHwnd(), HITEM(item), 0);
     }
@@ -2226,7 +2193,7 @@ bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
         // conjunction with modifiers
         if ( (msg->wParam == VK_RETURN) && !wxIsAnyModifierDown() )
         {
         // conjunction with modifiers
         if ( (msg->wParam == VK_RETURN) && !wxIsAnyModifierDown() )
         {
-            // we need VK_RETURN to generate wxEVT_COMMAND_TREE_ITEM_ACTIVATED
+            // we need VK_RETURN to generate wxEVT_TREE_ITEM_ACTIVATED
             return false;
         }
     }
             return false;
         }
     }
@@ -2240,7 +2207,7 @@ bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
 
     if ( cmd == EN_UPDATE )
     {
 
     if ( cmd == EN_UPDATE )
     {
-        wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
+        wxCommandEvent event(wxEVT_TEXT, id);
         event.SetEventObject( this );
         ProcessCommand(event);
     }
         event.SetEventObject( this );
         ProcessCommand(event);
     }
@@ -2284,7 +2251,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
             if ( vkey != VK_RETURN && bCtrl )
             {
 
             if ( vkey != VK_RETURN && bCtrl )
             {
-                wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                           this, htSel);
                 changingEvent.m_itemOld = htSel;
 
                                           this, htSel);
                 changingEvent.m_itemOld = htSel;
 
@@ -2292,7 +2259,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 {
                     DoToggleItemSelection(wxTreeItemId(htSel));
 
                 {
                     DoToggleItemSelection(wxTreeItemId(htSel));
 
-                    wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                    wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                              this, htSel);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
                                              this, htSel);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
@@ -2305,7 +2272,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
                 if ( count != 1 || HITEM(selections[0]) != htSel )
                 {
 
                 if ( count != 1 || HITEM(selections[0]) != htSel )
                 {
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                               this, htSel);
                     changingEvent.m_itemOld = htSel;
 
                                               this, htSel);
                     changingEvent.m_itemOld = htSel;
 
@@ -2314,7 +2281,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                         DoUnselectAll();
                         DoSelectItem(wxTreeItemId(htSel));
 
                         DoUnselectAll();
                         DoSelectItem(wxTreeItemId(htSel));
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                  this, htSel);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
                                                  this, htSel);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
@@ -2349,7 +2316,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     break;
                 }
 
                     break;
                 }
 
-                wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                           this, next);
                 changingEvent.m_itemOld = htSel;
 
                                           this, next);
                 changingEvent.m_itemOld = htSel;
 
@@ -2359,7 +2326,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
-                    wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                    wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                              this, next);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
                                              this, next);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
@@ -2384,7 +2351,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 if ( bShift && SelectRange(GetHwnd(), HITEM(m_htSelStart), HITEM(next),
                      SR_UNSELECT_OTHERS | SR_SIMULATE) )
                 {
                 if ( bShift && SelectRange(GetHwnd(), HITEM(m_htSelStart), HITEM(next),
                      SR_UNSELECT_OTHERS | SR_SIMULATE) )
                 {
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, next);
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this, next);
                     changingEvent.m_itemOld = htSel;
 
                     if ( IsTreeEventAllowed(changingEvent) )
                     changingEvent.m_itemOld = htSel;
 
                     if ( IsTreeEventAllowed(changingEvent) )
@@ -2392,7 +2359,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                         SelectRange(GetHwnd(), HITEM(m_htSelStart), HITEM(next),
                                     SR_UNSELECT_OTHERS);
 
                         SelectRange(GetHwnd(), HITEM(m_htSelStart), HITEM(next),
                                     SR_UNSELECT_OTHERS);
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, next);
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED, this, next);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
                     }
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
                     }
@@ -2413,7 +2380,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
                 if ( next.IsOk() && !IsHiddenRoot(next) )
                 {
 
                 if ( next.IsOk() && !IsHiddenRoot(next) )
                 {
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                               this, next);
                     changingEvent.m_itemOld = htSel;
 
                                               this, next);
                     changingEvent.m_itemOld = htSel;
 
@@ -2423,7 +2390,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                         DoSelectItem(next);
                         SetFocusedItem(next);
 
                         DoSelectItem(next);
                         SetFocusedItem(next);
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                  this, next);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
                                                  this, next);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
@@ -2449,7 +2416,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
             {
                 wxTreeItemId next = TreeView_GetChild(GetHwnd(), htSel);
 
             {
                 wxTreeItemId next = TreeView_GetChild(GetHwnd(), htSel);
 
-                wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, next);
+                wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING, this, next);
                 changingEvent.m_itemOld = htSel;
 
                 if ( IsTreeEventAllowed(changingEvent) )
                 changingEvent.m_itemOld = htSel;
 
                 if ( IsTreeEventAllowed(changingEvent) )
@@ -2458,7 +2425,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
-                    wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, next);
+                    wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED, this, next);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
                 }
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
                 }
@@ -2506,7 +2473,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                                      HITEM(m_htSelStart), HITEM(next),
                                      SR_UNSELECT_OTHERS | SR_SIMULATE) )
                     {
                                      HITEM(m_htSelStart), HITEM(next),
                                      SR_UNSELECT_OTHERS | SR_SIMULATE) )
                     {
-                        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                        wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                                   this, next);
                         changingEvent.m_itemOld = htSel;
 
                                                   this, next);
                         changingEvent.m_itemOld = htSel;
 
@@ -2517,7 +2484,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                                         SR_UNSELECT_OTHERS);
                             SetFocusedItem(next);
 
                                         SR_UNSELECT_OTHERS);
                             SetFocusedItem(next);
 
-                            wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                            wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                      this, next);
                             changedEvent.m_itemOld = htSel;
                             (void)HandleTreeEvent(changedEvent);
                                                      this, next);
                             changedEvent.m_itemOld = htSel;
                             (void)HandleTreeEvent(changedEvent);
@@ -2526,7 +2493,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 }
                 else // no Shift
                 {
                 }
                 else // no Shift
                 {
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                               this, next);
                     changingEvent.m_itemOld = htSel;
 
                                               this, next);
                     changingEvent.m_itemOld = htSel;
 
@@ -2536,7 +2503,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                         DoSelectItem(next);
                         SetFocusedItem(next);
 
                         DoSelectItem(next);
                         SetFocusedItem(next);
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                  this, next);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
                                                  this, next);
                         changedEvent.m_itemOld = htSel;
                         (void)HandleTreeEvent(changedEvent);
@@ -2628,7 +2595,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     next = nextTemp;
                 }
 
                     next = nextTemp;
                 }
 
-                wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                           this, next);
                 changingEvent.m_itemOld = htSel;
 
                                           this, next);
                 changingEvent.m_itemOld = htSel;
 
@@ -2639,7 +2606,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
                     DoSelectItem(next);
                     SetFocusedItem(next);
 
-                    wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                    wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                              this, next);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
                                              this, next);
                     changedEvent.m_itemOld = htSel;
                     (void)HandleTreeEvent(changedEvent);
@@ -2656,19 +2623,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
 bool wxTreeCtrl::MSWHandleTreeKeyDownEvent(WXWPARAM wParam, WXLPARAM lParam)
 {
 
 bool wxTreeCtrl::MSWHandleTreeKeyDownEvent(WXWPARAM wParam, WXLPARAM lParam)
 {
-    wxTreeEvent keyEvent(wxEVT_COMMAND_TREE_KEY_DOWN, this);
-
-    int keyCode = wxCharCodeMSWToWX(wParam);
-
-    if ( !keyCode )
-    {
-        // wxCharCodeMSWToWX() returns 0 to indicate that this is a
-        // simple ASCII key
-        keyCode = wParam;
-    }
-
-    keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, keyCode,
-                                       lParam, wParam);
+    wxTreeEvent keyEvent(wxEVT_TREE_KEY_DOWN, this);
+    keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, wParam, lParam);
 
     bool processed = HandleTreeEvent(keyEvent);
 
 
     bool processed = HandleTreeEvent(keyEvent);
 
@@ -2679,7 +2635,7 @@ bool wxTreeCtrl::MSWHandleTreeKeyDownEvent(WXWPARAM wParam, WXLPARAM lParam)
         const HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd());
         if ( htSel )
         {
         const HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd());
         if ( htSel )
         {
-            wxTreeEvent activatedEvent(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
+            wxTreeEvent activatedEvent(wxEVT_TREE_ITEM_ACTIVATED,
                                        this, htSel);
             (void)HandleTreeEvent(activatedEvent);
         }
                                        this, htSel);
             (void)HandleTreeEvent(activatedEvent);
         }
@@ -2740,13 +2696,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
         }
 
         // create the event
         }
 
         // create the event
-        wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item);
+        if ( item.IsOk() )
+        {
+            wxTreeEvent event(wxEVT_TREE_ITEM_MENU, this, item);
 
 
-        event.m_pointDrag = pt;
+            event.m_pointDrag = pt;
 
 
-        if ( HandleTreeEvent(event) )
-            processed = true;
-        //else: continue with generating wxEVT_CONTEXT_MENU in base class code
+            if ( HandleTreeEvent(event) )
+                processed = true;
+            //else: continue with generating wxEVT_CONTEXT_MENU in base class code
+        }
     }
     else if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) )
     {
     }
     else if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) )
     {
@@ -2812,7 +2771,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         break;
                     }
 
                         break;
                     }
 
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                               this, htItem);
                     changingEvent.m_itemOld = htOldItem;
 
                                               this, htItem);
                     changingEvent.m_itemOld = htOldItem;
 
@@ -2826,7 +2785,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         // reset on any click without Shift
                         m_htSelStart.Unset();
 
                         // reset on any click without Shift
                         m_htSelStart.Unset();
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                  this, htItem);
                         changedEvent.m_itemOld = htOldItem;
                         (void)HandleTreeEvent(changedEvent);
                                                  this, htItem);
                         changedEvent.m_itemOld = htOldItem;
                         (void)HandleTreeEvent(changedEvent);
@@ -2861,7 +2820,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 
                     if ( willChange )
                     {
 
                     if ( willChange )
                     {
-                        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                        wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                                   this, htItem);
                         changingEvent.m_itemOld = htOldItem;
 
                                                   this, htItem);
                         changingEvent.m_itemOld = htOldItem;
 
@@ -2881,7 +2840,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 
                             SetFocusedItem(wxTreeItemId(htItem));
 
 
                             SetFocusedItem(wxTreeItemId(htItem));
 
-                            wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                            wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                      this, htItem);
                             changedEvent.m_itemOld = htOldItem;
                             (void)HandleTreeEvent(changedEvent);
                                                      this, htItem);
                             changedEvent.m_itemOld = htOldItem;
                             (void)HandleTreeEvent(changedEvent);
@@ -2912,7 +2871,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         // multiple drag and drop to work.
                         if ( !IsItemSelected(GetHwnd(), htItem))
                         {
                         // multiple drag and drop to work.
                         if ( !IsItemSelected(GetHwnd(), htItem))
                         {
-                            wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                            wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;
 
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;
 
@@ -2922,7 +2881,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                                 DoSelectItem(wxTreeItemId(htItem));
                                 SetFocusedItem(wxTreeItemId(htItem));
 
                                 DoSelectItem(wxTreeItemId(htItem));
                                 SetFocusedItem(wxTreeItemId(htItem));
 
-                                wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                                wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                          this, htItem);
                                 changedEvent.m_itemOld = htOldItem;
                                 (void)HandleTreeEvent(changedEvent);
                                                          this, htItem);
                                 changedEvent.m_itemOld = htOldItem;
                                 (void)HandleTreeEvent(changedEvent);
@@ -2966,10 +2925,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 // click if needed
                 if ( processed )
                 {
                 // click if needed
                 if ( processed )
                 {
-                    int htFlags = 0;
-                    wxTreeItemId item = HitTest(wxPoint(x, y), htFlags);
-
-                    if ( htFlags & wxTREE_HITTEST_ONITEMSTATEICON )
+                    if ( tvht.flags & TVHT_ONITEMSTATEICON )
                     {
                         m_triggerStateImageClick = true;
                     }
                     {
                         m_triggerStateImageClick = true;
                     }
@@ -2994,7 +2950,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 // confusing, so override this default behaviour
                 if ( !IsItemSelected(GetHwnd(), htItem) )
                 {
                 // confusing, so override this default behaviour
                 if ( !IsItemSelected(GetHwnd(), htItem) )
                 {
-                    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                    wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                               this, htItem);
                     changingEvent.m_itemOld = htOldItem;
 
                                               this, htItem);
                     changingEvent.m_itemOld = htOldItem;
 
@@ -3004,7 +2960,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         DoSelectItem(wxTreeItemId(htItem));
                         SetFocusedItem(wxTreeItemId(htItem));
 
                         DoSelectItem(wxTreeItemId(htItem));
                         SetFocusedItem(wxTreeItemId(htItem));
 
-                        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                        wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                  this, htItem);
                         changedEvent.m_itemOld = htOldItem;
                         (void)HandleTreeEvent(changedEvent);
                                                  this, htItem);
                         changedEvent.m_itemOld = htOldItem;
                         (void)HandleTreeEvent(changedEvent);
@@ -3088,7 +3044,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         {
                             m_mouseUpDeselect = false;
 
                         {
                             m_mouseUpDeselect = false;
 
-                            wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
+                            wxTreeEvent changingEvent(wxEVT_TREE_SEL_CHANGING,
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;
 
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;
 
@@ -3098,7 +3054,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                                 DoSelectItem(wxTreeItemId(htItem));
                                 SetFocusedItem(wxTreeItemId(htItem));
 
                                 DoSelectItem(wxTreeItemId(htItem));
                                 SetFocusedItem(wxTreeItemId(htItem));
 
-                                wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
+                                wxTreeEvent changedEvent(wxEVT_TREE_SEL_CHANGED,
                                                          this, htItem);
                                 changedEvent.m_itemOld = htOldItem;
                                 (void)HandleTreeEvent(changedEvent);
                                                          this, htItem);
                                 changedEvent.m_itemOld = htOldItem;
                                 (void)HandleTreeEvent(changedEvent);
@@ -3112,7 +3068,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                     {
                         if ( tvht.flags & TVHT_ONITEMSTATEICON )
                         {
                     {
                         if ( tvht.flags & TVHT_ONITEMSTATEICON )
                         {
-                            wxTreeEvent event(wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK,
+                            wxTreeEvent event(wxEVT_TREE_STATE_IMAGE_CLICK,
                                               this, htItem);
                             (void)HandleTreeEvent(event);
 
                                               this, htItem);
                             (void)HandleTreeEvent(event);
 
@@ -3134,11 +3090,10 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 if ( m_dragImage )
                 {
                     m_dragImage->EndDrag();
                 if ( m_dragImage )
                 {
                     m_dragImage->EndDrag();
-                    delete m_dragImage;
-                    m_dragImage = NULL;
+                    wxDELETE(m_dragImage);
 
                     // generate the drag end event
 
                     // generate the drag end event
-                    wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG,
+                    wxTreeEvent event(wxEVT_TREE_END_DRAG,
                                       this, htItem);
                     event.m_pointDrag = wxPoint(x, y);
                     (void)HandleTreeEvent(event);
                                       this, htItem);
                     event.m_pointDrag = wxPoint(x, y);
                     (void)HandleTreeEvent(event);
@@ -3175,16 +3130,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
             // do it for the other items itself - help it
             wxArrayTreeItemIds selections;
             size_t count = GetSelections(selections);
             // do it for the other items itself - help it
             wxArrayTreeItemIds selections;
             size_t count = GetSelections(selections);
-            RECT rect;
+            TVGetItemRectParam param;
 
             for ( size_t n = 0; n < count; n++ )
             {
                 // TreeView_GetItemRect() will return false if item is not
                 // visible, which may happen perfectly well
 
             for ( size_t n = 0; n < count; n++ )
             {
                 // TreeView_GetItemRect() will return false if item is not
                 // visible, which may happen perfectly well
-                if ( TreeView_GetItemRect(GetHwnd(), HITEM(selections[n]),
-                                          &rect, TRUE) )
+                if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(selections[n]),
+                                            param, TRUE) )
                 {
                 {
-                    ::InvalidateRect(GetHwnd(), &rect, FALSE);
+                    ::InvalidateRect(GetHwnd(), &param.rect, FALSE);
                 }
             }
         }
                 }
             }
         }
@@ -3275,8 +3230,7 @@ wxTreeCtrl::MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
             if ( m_dragImage )
             {
                 m_dragImage->EndDrag();
             if ( m_dragImage )
             {
                 m_dragImage->EndDrag();
-                delete m_dragImage;
-                m_dragImage = NULL;
+                wxDELETE(m_dragImage);
 
                 // if we don't do it, the tree seems to think that 2 items
                 // are selected simultaneously which is quite weird
 
                 // if we don't do it, the tree seems to think that 2 items
                 // are selected simultaneously which is quite weird
@@ -3299,13 +3253,13 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
     switch ( hdr->code )
     {
         case TVN_BEGINDRAG:
     switch ( hdr->code )
     {
         case TVN_BEGINDRAG:
-            eventType = wxEVT_COMMAND_TREE_BEGIN_DRAG;
+            eventType = wxEVT_TREE_BEGIN_DRAG;
             // fall through
 
         case TVN_BEGINRDRAG:
             {
                 if ( eventType == wxEVT_NULL )
             // fall through
 
         case TVN_BEGINRDRAG:
             {
                 if ( eventType == wxEVT_NULL )
-                    eventType = wxEVT_COMMAND_TREE_BEGIN_RDRAG;
+                    eventType = wxEVT_TREE_BEGIN_RDRAG;
                 //else: left drag, already set above
 
                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
                 //else: left drag, already set above
 
                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
@@ -3322,7 +3276,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
         case TVN_BEGINLABELEDIT:
             {
 
         case TVN_BEGINLABELEDIT:
             {
-                eventType = wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT;
+                eventType = wxEVT_TREE_BEGIN_LABEL_EDIT;
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
 
                 // although the user event handler may still veto it, it is
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
 
                 // although the user event handler may still veto it, it is
@@ -3337,7 +3291,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
         case TVN_DELETEITEM:
             {
 
         case TVN_DELETEITEM:
             {
-                eventType = wxEVT_COMMAND_TREE_DELETE_ITEM;
+                eventType = wxEVT_TREE_DELETE_ITEM;
                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
 
                 event.m_item = tv->itemOld.hItem;
                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
 
                 event.m_item = tv->itemOld.hItem;
@@ -3356,7 +3310,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
         case TVN_ENDLABELEDIT:
             {
 
         case TVN_ENDLABELEDIT:
             {
-                eventType = wxEVT_COMMAND_TREE_END_LABEL_EDIT;
+                eventType = wxEVT_TREE_END_LABEL_EDIT;
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
 
                 event.m_item = info->item.hItem;
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
 
                 event.m_item = info->item.hItem;
@@ -3380,7 +3334,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 #ifdef TVN_GETINFOTIP
         case TVN_GETINFOTIP:
             {
 #ifdef TVN_GETINFOTIP
         case TVN_GETINFOTIP:
             {
-                eventType = wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP;
+                eventType = wxEVT_TREE_ITEM_GETTOOLTIP;
                 NMTVGETINFOTIP *info = (NMTVGETINFOTIP*)lParam;
 
                 // Which item are we trying to get a tooltip for?
                 NMTVGETINFOTIP *info = (NMTVGETINFOTIP*)lParam;
 
                 // Which item are we trying to get a tooltip for?
@@ -3392,13 +3346,13 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 #endif // !__WXWINCE__
 
         case TVN_GETDISPINFO:
 #endif // !__WXWINCE__
 
         case TVN_GETDISPINFO:
-            eventType = wxEVT_COMMAND_TREE_GET_INFO;
+            eventType = wxEVT_TREE_GET_INFO;
             // fall through
 
         case TVN_SETDISPINFO:
             {
                 if ( eventType == wxEVT_NULL )
             // fall through
 
         case TVN_SETDISPINFO:
             {
                 if ( eventType == wxEVT_NULL )
-                    eventType = wxEVT_COMMAND_TREE_SET_INFO;
+                    eventType = wxEVT_TREE_SET_INFO;
                 //else: get, already set above
 
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
                 //else: get, already set above
 
                 TV_DISPINFO *info = (TV_DISPINFO *)lParam;
@@ -3454,7 +3408,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         // the wrong items are deselected.
 
         // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING
         // the wrong items are deselected.
 
         // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING
-        // that can be used to regulate this incorrect behavior.  The
+        // that can be used to regulate this incorrect behaviour.  The
         // following messages will allow only the unlocked item's selection
         // state to change
 
         // following messages will allow only the unlocked item's selection
         // state to change
 
@@ -3484,18 +3438,18 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         //     we have to handle both messages:
         case TVN_SELCHANGEDA:
         case TVN_SELCHANGEDW:
         //     we have to handle both messages:
         case TVN_SELCHANGEDA:
         case TVN_SELCHANGEDW:
-            if ( !HasFlag(wxTR_MULTIPLE) || !m_changingSelection )
+            if ( !m_changingSelection )
             {
             {
-                eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
+                eventType = wxEVT_TREE_SEL_CHANGED;
             }
             // fall through
 
         case TVN_SELCHANGINGA:
         case TVN_SELCHANGINGW:
             }
             // fall through
 
         case TVN_SELCHANGINGA:
         case TVN_SELCHANGINGW:
-            if ( !HasFlag(wxTR_MULTIPLE) || !m_changingSelection )
+            if ( !m_changingSelection )
             {
                 if ( eventType == wxEVT_NULL )
             {
                 if ( eventType == wxEVT_NULL )
-                    eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
+                    eventType = wxEVT_TREE_SEL_CHANGING;
                 //else: already set above
 
                 if (hdr->code == TVN_SELCHANGINGW ||
                 //else: already set above
 
                 if (hdr->code == TVN_SELCHANGINGW ||
@@ -3524,12 +3478,13 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             //
             // to avoid such surprises, we force the generation of focus events
             // now, before we generate the selection change ones
             //
             // to avoid such surprises, we force the generation of focus events
             // now, before we generate the selection change ones
-            SetFocus();
+            if ( !m_changingSelection && !m_isBeingDeleted )
+                SetFocus();
             break;
 
         // instead of explicitly checking for _WIN32_IE, check if the
         // required symbols are available in the headers
             break;
 
         // instead of explicitly checking for _WIN32_IE, check if the
         // required symbols are available in the headers
-#if defined(CDDS_PREPAINT) && !wxUSE_COMCTL32_SAFELY
+#if defined(CDDS_PREPAINT)
         case NM_CUSTOMDRAW:
             {
                 LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam;
         case NM_CUSTOMDRAW:
             {
                 LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam;
@@ -3558,7 +3513,10 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                             {
                                 wxLoadedDLL dllComCtl32(wxT("comctl32.dll"));
                                 if ( dllComCtl32.IsLoaded() )
                             {
                                 wxLoadedDLL dllComCtl32(wxT("comctl32.dll"));
                                 if ( dllComCtl32.IsLoaded() )
+                                {
                                     wxDL_INIT_FUNC(s_pfn, ImageList_Copy, dllComCtl32);
                                     wxDL_INIT_FUNC(s_pfn, ImageList_Copy, dllComCtl32);
+                                    loaded = true;
+                                }
                             }
 
                             if ( !s_pfnImageList_Copy )
                             }
 
                             if ( !s_pfnImageList_Copy )
@@ -3690,7 +3648,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                 if ( htFlags & wxTREE_HITTEST_ONITEMSTATEICON )
                 {
                     event.m_item = item;
                 if ( htFlags & wxTREE_HITTEST_ONITEMSTATEICON )
                 {
                     event.m_item = item;
-                    eventType = wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK;
+                    eventType = wxEVT_TREE_STATE_IMAGE_CLICK;
                 }
 
                 break;
                 }
 
                 break;
@@ -3700,7 +3658,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         case NM_RCLICK:
             {
                 TV_HITTESTINFO tvhti;
         case NM_RCLICK:
             {
                 TV_HITTESTINFO tvhti;
-                ::GetCursorPos(&tvhti.pt);
+                wxGetCursorPosMSW(&tvhti.pt);
                 ::ScreenToClient(GetHwnd(), &tvhti.pt);
                 if ( TreeView_HitTest(GetHwnd(), &tvhti) )
                 {
                 ::ScreenToClient(GetHwnd(), &tvhti.pt);
                 if ( TreeView_HitTest(GetHwnd(), &tvhti) )
                 {
@@ -3708,8 +3666,8 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                     {
                         event.m_item = tvhti.hItem;
                         eventType = (int)hdr->code == NM_DBLCLK
                     {
                         event.m_item = tvhti.hItem;
                         eventType = (int)hdr->code == NM_DBLCLK
-                                    ? wxEVT_COMMAND_TREE_ITEM_ACTIVATED
-                                    : wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK;
+                                    ? wxEVT_TREE_ITEM_ACTIVATED
+                                    : wxEVT_TREE_ITEM_RIGHT_CLICK;
 
                         event.m_pointDrag.x = tvhti.pt.x;
                         event.m_pointDrag.y = tvhti.pt.y;
 
                         event.m_pointDrag.x = tvhti.pt.x;
                         event.m_pointDrag.y = tvhti.pt.y;
@@ -3965,4 +3923,51 @@ void wxTreeCtrl::DoSetItemState(const wxTreeItemId& item, int state)
     DoSetItem(&tvItem);
 }
 
     DoSetItem(&tvItem);
 }
 
+// ----------------------------------------------------------------------------
+// Update locking.
+// ----------------------------------------------------------------------------
+
+// Using WM_SETREDRAW with the native control is a bad idea as it's broken in
+// some Windows versions (see http://support.microsoft.com/kb/130611) and
+// doesn't seem to do anything in other ones (e.g. under Windows 7 the tree
+// control keeps updating its scrollbars while the items are added to it,
+// resulting in horrible flicker when adding even a couple of dozen items).
+// So we resize it to the smallest possible size instead of freezing -- this
+// still flickers, but actually not as badly as it would if we didn't do it.
+
+void wxTreeCtrl::DoFreeze()
+{
+    if ( IsShown() )
+    {
+        RECT rc;
+        ::GetWindowRect(GetHwnd(), &rc);
+        m_thawnSize = wxRectFromRECT(rc).GetSize();
+
+        ::SetWindowPos(GetHwnd(), 0, 0, 0, 1, 1,
+                       SWP_NOMOVE | SWP_NOZORDER | SWP_NOREDRAW | SWP_NOACTIVATE);
+    }
+}
+
+void wxTreeCtrl::DoThaw()
+{
+    if ( IsShown() )
+    {
+        if ( m_thawnSize != wxDefaultSize )
+        {
+            ::SetWindowPos(GetHwnd(), 0, 0, 0, m_thawnSize.x, m_thawnSize.y,
+                           SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
+        }
+    }
+}
+
+// We also need to override DoSetSize() to ensure that m_thawnSize is reset if
+// the window is resized while being frozen -- in this case, we need to avoid
+// resizing it back to its original, pre-freeze, size when it's thawed.
+void wxTreeCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
+{
+    m_thawnSize = wxDefaultSize;
+
+    wxTreeCtrlBase::DoSetSize(x, y, width, height, sizeFlags);
+}
+
 #endif // wxUSE_TREECTRL
 #endif // wxUSE_TREECTRL
wxWidgets (Impactor)