]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/window.cpp
reverted wxSocket changes of rev 48723 as they broke linking under non-Unix systems
[wxWidgets.git] / src / msw / window.cpp
index b66358af13dd1d667df7279493a63075c7389e13..850a15f17dda0f69688625234f5eaf22d3f57b6b 100644 (file)
@@ -57,6 +57,7 @@
     #include "wx/ownerdrw.h"
 #endif
 
+#include "wx/hashmap.h"
 #include "wx/evtloop.h"
 #include "wx/power.h"
 #include "wx/sysopt.h"
 #endif
 #endif
 
+#if wxUSE_UXTHEME
+    #include "wx/msw/uxtheme.h"
+    #define EP_EDITTEXT         1
+    #define ETS_NORMAL          1
+    #define ETS_HOT             2
+    #define ETS_SELECTED        3
+    #define ETS_DISABLED        4
+    #define ETS_FOCUSED         5
+    #define ETS_READONLY        6
+    #define ETS_ASSIST          7
+#endif
+
 #if defined(TME_LEAVE) && defined(WM_MOUSELEAVE) && wxUSE_DYNLIB_CLASS
     #define HAVE_TRACKMOUSEEVENT
 #endif // everything needed for TrackMouseEvent()
     #define wxUSE_MOUSEEVENT_HACK 1
 #endif
 
+// not all compilers/platforms have X button related declarations (notably
+// Windows CE doesn't, and probably some old SDKs don't neither)
+#ifdef WM_XBUTTONDOWN
+    #define wxHAS_XBUTTON
+#endif
+
 // ---------------------------------------------------------------------------
 // global variables
 // ---------------------------------------------------------------------------
@@ -172,6 +191,13 @@ static struct MouseEventInfoDummy
 } gs_lastMouseEvent;
 #endif // wxUSE_MOUSEEVENT_HACK
 
+// hash containing the registered handlers for the custom messages
+WX_DECLARE_HASH_MAP(int, wxWindow::MSWMessageHandler,
+                    wxIntegerHash, wxIntegerEqual,
+                    MSWMessageHandlers);
+
+static MSWMessageHandlers gs_messageHandlers;
+
 // ---------------------------------------------------------------------------
 // private functions
 // ---------------------------------------------------------------------------
@@ -918,10 +944,7 @@ void wxWindowMSW::ScrollWindow(int dx, int dy, const wxRect *prect)
     RECT *pr;
     if ( prect )
     {
-        rect.left = prect->x;
-        rect.top = prect->y;
-        rect.right = prect->x + prect->width;
-        rect.bottom = prect->y + prect->height;
+        wxCopyRectToRECT(*prect, rect);
         pr = ▭
     }
     else
@@ -1263,6 +1286,32 @@ void wxWindowMSW::MSWUpdateStyle(long flagsOld, long exflagsOld)
     }
 }
 
+wxBorder wxWindowMSW::GetDefaultBorderForControl() const
+{
+    // we want to automatically give controls a sunken style (confusingly,
+    // it may not really mean sunken at all as we map it to WS_EX_CLIENTEDGE
+    // which is not sunken at all under Windows XP -- rather, just the default)
+
+#if defined(__POCKETPC__) || defined(__SMARTPHONE__)
+    return wxBORDER_SIMPLE;
+#else
+#if wxUSE_UXTHEME
+    if (CanApplyThemeBorder())
+    {
+        wxUxThemeEngine* theme = wxUxThemeEngine::GetIfActive();
+        if (theme)
+            return wxBORDER_THEME;
+    }
+#endif
+    return wxBORDER_SUNKEN;
+#endif
+}
+
+wxBorder wxWindowMSW::GetDefaultBorder() const
+{
+    return GetDefaultBorderForControl();
+}
+
 WXDWORD wxWindowMSW::MSWGetStyle(long flags, WXDWORD *exstyle) const
 {
     // translate common wxWidgets styles to Windows ones
@@ -1310,10 +1359,8 @@ WXDWORD wxWindowMSW::MSWGetStyle(long flags, WXDWORD *exstyle) const
 
         switch ( border )
         {
-            default:
-            case wxBORDER_DEFAULT:
-                wxFAIL_MSG( _T("unknown border style") );
-                // fall through
+            case wxBORDER_DEFAULT: // also wxBORDER_THEME
+                break;
 
             case wxBORDER_NONE:
             case wxBORDER_SIMPLE:
@@ -1332,6 +1379,10 @@ WXDWORD wxWindowMSW::MSWGetStyle(long flags, WXDWORD *exstyle) const
                 style &= ~WS_BORDER;
                 break;
 
+            default:
+                wxFAIL_MSG( _T("unknown border style") );
+                break;
+
             case wxBORDER_DOUBLE:
                 *exstyle |= WS_EX_DLGMODALFRAME;
                 break;
@@ -1459,11 +1510,7 @@ void wxWindowMSW::Refresh(bool eraseBack, const wxRect *rect)
         const RECT *pRect;
         if ( rect )
         {
-            mswRect.left = rect->x;
-            mswRect.top = rect->y;
-            mswRect.right = rect->x + rect->width;
-            mswRect.bottom = rect->y + rect->height;
-
+            wxCopyRectToRECT(*rect, mswRect);
             pRect = &mswRect;
         }
         else
@@ -1978,7 +2025,7 @@ void wxWindowMSW::GetTextExtent(const wxString& string,
 
     SIZE sizeRect;
     TEXTMETRIC tm;
-    ::GetTextExtentPoint32(hdc, string, string.length(), &sizeRect);
+    ::GetTextExtentPoint32(hdc, string.wx_str(), string.length(), &sizeRect);
     GetTextMetrics(hdc, &tm);
 
     if ( x )
@@ -2331,7 +2378,7 @@ bool wxWindowMSW::MSWShouldPreProcessMessage(WXMSG* msg)
               node = node->GetNext() )
         {
             wxWindow * const win = node->GetData();
-            if ( win->AcceptsFocus() &&
+            if ( win->CanAcceptFocus() &&
                     !(::GetWindowLong(GetHwndOf(win), GWL_EXSTYLE) &
                         WS_EX_CONTROLPARENT) )
             {
@@ -2463,7 +2510,7 @@ LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message, WPARAM w
 
     LRESULT rc;
 
-    if ( wnd && wxEventLoop::AllowProcessing(wnd) )
+    if ( wnd && wxGUIEventLoop::AllowProcessing(wnd) )
         rc = wnd->MSWWindowProc(message, wParam, lParam);
     else
         rc = ::DefWindowProc(hWnd, message, wParam, lParam);
@@ -2535,7 +2582,19 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
                 }
             }
             break;
+#if 0
+        case WM_ENTERSIZEMOVE:
+            {
+                processed = HandleEnterSizeMove();
+            }
+            break;
 
+        case WM_EXITSIZEMOVE:
+            {
+                processed = HandleExitSizeMove();
+            }
+            break;
+#endif
         case WM_SIZING:
             {
                 LPRECT pRect = (LPRECT)lParam;
@@ -2651,6 +2710,11 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
         case WM_MBUTTONDOWN:
         case WM_MBUTTONUP:
         case WM_MBUTTONDBLCLK:
+#ifdef wxHAS_XBUTTON
+        case WM_XBUTTONDOWN:
+        case WM_XBUTTONUP:
+        case WM_XBUTTONDBLCLK:
+#endif // wxHAS_XBUTTON
             {
 #ifdef __WXMICROWIN__
                 // MicroWindows seems to ignore the fact that a window is
@@ -2741,7 +2805,7 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
                     // problems, so don't do it for them (unnecessary anyhow)
                     if ( !win->IsOfStandardClass() )
                     {
-                        if ( message == WM_LBUTTONDOWN && win->AcceptsFocus() )
+                        if ( message == WM_LBUTTONDOWN && win->IsFocusable() )
                             win->SetFocus();
                     }
                 }
@@ -3150,6 +3214,7 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
             break;
 #endif
 
+#if wxUSE_MENUS
         case WM_MENUCHAR:
             // we're only interested in our own menus, not MF_SYSMENU
             if ( HIWORD(wParam) == MF_POPUP )
@@ -3163,6 +3228,7 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
                 }
             }
             break;
+#endif // wxUSE_MENUS
 
 #ifndef __WXWINCE__
         case WM_POWERBROADCAST:
@@ -3173,6 +3239,103 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
             }
             break;
 #endif // __WXWINCE__
+
+#if wxUSE_UXTHEME
+        // If we want the default themed border then we need to draw it ourselves
+        case WM_NCCALCSIZE:
+            {
+                wxUxThemeEngine* theme = wxUxThemeEngine::GetIfActive();
+                if (theme && GetBorder() == wxBORDER_THEME)
+                {
+                    // first ask the widget to calculate the border size
+                    rc.result = MSWDefWindowProc(message, wParam, lParam);
+                    processed = true;
+
+                    // now alter the client size making room for drawing a themed border
+                    NCCALCSIZE_PARAMS *csparam = NULL;
+                    RECT rect;
+                    if (wParam)
+                    {
+                        csparam = (NCCALCSIZE_PARAMS*)lParam;
+                        rect = csparam->rgrc[0];
+                    }
+                    else
+                    {
+                        rect = *((RECT*)lParam);
+                    }
+                    wxUxThemeHandle hTheme(this, L"EDIT");
+                    RECT rcClient = { 0, 0, 0, 0 };
+                    wxClientDC dc(this);
+
+                    if (theme->GetThemeBackgroundContentRect(
+                            hTheme, GetHdcOf(dc), EP_EDITTEXT, ETS_NORMAL,
+                            &rect, &rcClient) == S_OK)
+                    {
+                        InflateRect(&rcClient, -1, -1);
+                        if (wParam)
+                            csparam->rgrc[0] = rcClient;
+                        else
+                            *((RECT*)lParam) = rcClient;
+                        rc.result = WVR_REDRAW;
+                    }
+                }
+            }
+            break;
+
+        case WM_NCPAINT:
+            {
+                wxUxThemeEngine* theme = wxUxThemeEngine::GetIfActive();
+                if (theme && GetBorder() == wxBORDER_THEME)
+                {
+                    // first ask the widget to paint its non-client area, such as scrollbars, etc.
+                    rc.result = MSWDefWindowProc(message, wParam, lParam);
+                    processed = true;
+
+                    wxUxThemeHandle hTheme(this, L"EDIT");
+                    wxWindowDC dc(this);
+
+                    // Clip the DC so that you only draw on the non-client area
+                    RECT rcBorder;
+                    wxCopyRectToRECT(GetSize(), rcBorder);
+
+                    RECT rcClient;
+                    theme->GetThemeBackgroundContentRect(
+                        hTheme, GetHdcOf(dc), EP_EDITTEXT, ETS_NORMAL, &rcBorder, &rcClient);
+                    InflateRect(&rcClient, -1, -1);
+
+                    ::ExcludeClipRect(GetHdcOf(dc), rcClient.left, rcClient.top,
+                                      rcClient.right, rcClient.bottom);
+
+                    // Make sure the background is in a proper state
+                    if (theme->IsThemeBackgroundPartiallyTransparent(hTheme, EP_EDITTEXT, ETS_NORMAL))
+                    {
+                        theme->DrawThemeParentBackground(GetHwnd(), GetHdcOf(dc), &rcBorder);
+                    }
+
+                    // Draw the border
+                    int nState;
+                    if ( !IsEnabled() )
+                        nState = ETS_DISABLED;
+                    // should we check this?
+                    //else if ( ::GetWindowLong(GetHwnd(), GWL_STYLE) & ES_READONLY)
+                    //    nState = ETS_READONLY;
+                    else
+                        nState = ETS_NORMAL;
+                    theme->DrawThemeBackground(hTheme, GetHdcOf(dc), EP_EDITTEXT, nState, &rcBorder, NULL);
+                }
+            }
+            break;
+
+#endif // wxUSE_UXTHEME
+
+        default:
+            // try a custom message handler
+            const MSWMessageHandlers::const_iterator
+                i = gs_messageHandlers.find(message);
+            if ( i != gs_messageHandlers.end() )
+            {
+                processed = (*i->second)(this, message, wParam, lParam);
+            }
     }
 
     if ( !processed )
@@ -3359,8 +3522,8 @@ bool wxWindowMSW::MSWCreate(const wxChar *wclass,
     m_hWnd = (WXHWND)::CreateWindowEx
                        (
                         extendedStyle,
-                        className,
-                        title ? title : (const wxChar*)m_windowName.c_str(),
+                        className.wx_str(),
+                        title ? title : m_windowName.wx_str(),
                         style,
                         x, y, w, h,
                         (HWND)MSWGetParent(),
@@ -3480,7 +3643,7 @@ bool wxWindowMSW::HandleTooltipNotify(WXUINT code,
                     (
                         CP_ACP,
                         0,                      // no flags
-                        ttip,
+                        ttip.wx_str(),
                         tipLength,
                         buf,
                         WXSIZEOF(buf) - 1
@@ -3798,63 +3961,56 @@ bool wxWindowMSW::HandleSetCursor(WXHWND WXUNUSED(hWnd),
 {
 #ifndef __WXMICROWIN__
     // the logic is as follows:
-    // -1. don't set cursor for non client area, including but not limited to
-    //     the title bar, scrollbars, &c
-    //  0. allow the user to override default behaviour by using EVT_SET_CURSOR
-    //  1. if we have the cursor set it unless wxIsBusy()
-    //  2. if we're a top level window, set some cursor anyhow
-    //  3. if wxIsBusy(), set the busy cursor, otherwise the global one
+    //  0. if we're busy, set the busy cursor (even for non client elements)
+    //  1. don't set custom cursor for non client area of enabled windows
+    //  2. ask user EVT_SET_CURSOR handler for the cursor
+    //  3. if still no cursor but we're in a TLW, set the global cursor
 
-    if ( nHitTest != HTCLIENT )
+    HCURSOR hcursor = 0;
+    if ( wxIsBusy() )
     {
-        return false;
+        hcursor = wxGetCurrentBusyCursor();
     }
+    else // not busy
+    {
+        if ( nHitTest != HTCLIENT )
+            return false;
 
-    HCURSOR hcursor = 0;
-
-    // first ask the user code - it may wish to set the cursor in some very
-    // specific way (for example, depending on the current position)
-    POINT pt;
+        // first ask the user code - it may wish to set the cursor in some very
+        // specific way (for example, depending on the current position)
+        POINT pt;
 #ifdef __WXWINCE__
-    if ( !::GetCursorPosWinCE(&pt))
+        if ( !::GetCursorPosWinCE(&pt))
 #else
-    if ( !::GetCursorPos(&pt) )
+        if ( !::GetCursorPos(&pt) )
 #endif
-    {
-        wxLogLastError(wxT("GetCursorPos"));
-    }
-
-    int x = pt.x,
-        y = pt.y;
-    ScreenToClient(&x, &y);
-    wxSetCursorEvent event(x, y);
-
-    bool processedEvtSetCursor = GetEventHandler()->ProcessEvent(event);
-    if ( processedEvtSetCursor && event.HasCursor() )
-    {
-        hcursor = GetHcursorOf(event.GetCursor());
-    }
+        {
+            wxLogLastError(wxT("GetCursorPos"));
+        }
 
-    if ( !hcursor )
-    {
-        bool isBusy = wxIsBusy();
+        int x = pt.x,
+            y = pt.y;
+        ScreenToClient(&x, &y);
+        wxSetCursorEvent event(x, y);
 
-        // the test for processedEvtSetCursor is here to prevent using m_cursor
-        // if the user code caught EVT_SET_CURSOR() and returned nothing from
-        // it - this is a way to say that our cursor shouldn't be used for this
-        // point
-        if ( !processedEvtSetCursor && m_cursor.Ok() )
+        bool processedEvtSetCursor = GetEventHandler()->ProcessEvent(event);
+        if ( processedEvtSetCursor && event.HasCursor() )
         {
-            hcursor = GetHcursorOf(m_cursor);
+            hcursor = GetHcursorOf(event.GetCursor());
         }
 
-        if ( !GetParent() )
+        if ( !hcursor )
         {
-            if ( isBusy )
+            // the test for processedEvtSetCursor is here to prevent using
+            // m_cursor if the user code caught EVT_SET_CURSOR() and returned
+            // nothing from it - this is a way to say that our cursor shouldn't
+            // be used for this point
+            if ( !processedEvtSetCursor && m_cursor.Ok() )
             {
-                hcursor = wxGetCurrentBusyCursor();
+                hcursor = GetHcursorOf(m_cursor);
             }
-            else if ( !hcursor )
+
+            if ( !hcursor && !GetParent() )
             {
                 const wxCursor *cursor = wxGetGlobalCursor();
                 if ( cursor && cursor->Ok() )
@@ -3865,10 +4021,9 @@ bool wxWindowMSW::HandleSetCursor(WXHWND WXUNUSED(hWnd),
         }
     }
 
+
     if ( hcursor )
     {
-//        wxLogDebug("HandleSetCursor: Setting cursor %ld", (long) hcursor);
-
         ::SetCursor(hcursor);
 
         // cursor set, stop here
@@ -4548,6 +4703,24 @@ bool wxWindowMSW::HandleMoving(wxRect& rect)
     return rc;
 }
 
+bool wxWindowMSW::HandleEnterSizeMove()
+{
+    wxMoveEvent event(wxPoint(0,0), m_windowId);
+    event.SetEventType(wxEVT_MOVE_START);
+    event.SetEventObject(this);
+
+    return GetEventHandler()->ProcessEvent(event);
+}
+
+bool wxWindowMSW::HandleExitSizeMove()
+{
+    wxMoveEvent event(wxPoint(0,0), m_windowId);
+    event.SetEventType(wxEVT_MOVE_END);
+    event.SetEventObject(this);
+
+    return GetEventHandler()->ProcessEvent(event);
+}
+
 bool wxWindowMSW::HandleSize(int WXUNUSED(w), int WXUNUSED(h), WXUINT wParam)
 {
 #if USE_DEFERRED_SIZING
@@ -4790,6 +4963,10 @@ void wxWindowMSW::InitMouseEvent(wxMouseEvent& event,
     event.m_leftDown = (flags & MK_LBUTTON) != 0;
     event.m_middleDown = (flags & MK_MBUTTON) != 0;
     event.m_rightDown = (flags & MK_RBUTTON) != 0;
+#ifdef wxHAS_XBUTTON
+    event.m_aux1Down = (flags & MK_XBUTTON1) != 0;
+    event.m_aux2Down = (flags & MK_XBUTTON2) != 0;
+#endif // wxHAS_XBUTTON
     event.m_altDown = ::GetKeyState(VK_MENU) < 0;
 
 #ifndef __WXWINCE__
@@ -4888,9 +5065,29 @@ bool wxWindowMSW::HandleMouseEvent(WXUINT msg, int x, int y, WXUINT flags)
         wxEVT_RIGHT_DCLICK,
         wxEVT_MIDDLE_DOWN,
         wxEVT_MIDDLE_UP,
-        wxEVT_MIDDLE_DCLICK
+        wxEVT_MIDDLE_DCLICK,
+        0, // this one is for wxEVT_MOTION which is not used here
+        wxEVT_AUX1_DOWN,
+        wxEVT_AUX1_UP,
+        wxEVT_AUX1_DCLICK,
+        wxEVT_AUX2_DOWN,
+        wxEVT_AUX2_UP,
+        wxEVT_AUX2_DCLICK
     };
 
+#ifdef wxHAS_XBUTTON
+    // the same messages are used for both auxillary mouse buttons so we need
+    // to adjust the index manually
+    switch ( msg )
+    {
+        case WM_XBUTTONDOWN:
+        case WM_XBUTTONUP:
+        case WM_XBUTTONDBLCLK:
+            if ( flags & MK_XBUTTON2 )
+                msg += wxEVT_AUX2_DOWN - wxEVT_AUX1_DOWN;
+    }
+#endif // wxHAS_XBUTTON
+
     wxMouseEvent event(eventsMouse[msg - WM_MOUSEMOVE]);
     InitMouseEvent(event, x, y, flags);
 
@@ -5185,6 +5382,7 @@ bool wxWindowMSW::HandleKeyUp(WXWPARAM wParam, WXLPARAM lParam)
     return GetEventHandler()->ProcessEvent(event);
 }
 
+#if wxUSE_MENUS
 int wxWindowMSW::HandleMenuChar(int WXUNUSED_IN_WINCE(chAccel),
                                 WXLPARAM WXUNUSED_IN_WINCE(lParam))
 {
@@ -5219,7 +5417,7 @@ int wxWindowMSW::HandleMenuChar(int WXUNUSED_IN_WINCE(chAccel),
                 //  menu creation code
                 wxMenuItem *item = (wxMenuItem*)mii.dwItemData;
 
-                const wxChar *p = wxStrchr(item->GetText(), _T('&'));
+                const wxChar *p = wxStrchr(item->GetItemLabel().wx_str(), _T('&'));
                 while ( p++ )
                 {
                     if ( *p == _T('&') )
@@ -5266,6 +5464,7 @@ bool wxWindowMSW::HandleClipboardEvent( WXUINT nMsg )
 
     return GetEventHandler()->ProcessEvent(evt);
 }
+#endif // wxUSE_MENUS
 
 // ---------------------------------------------------------------------------
 // joystick
@@ -5439,6 +5638,30 @@ bool wxWindowMSW::MSWOnScroll(int orientation, WXWORD wParam,
     return GetEventHandler()->ProcessEvent(event);
 }
 
+// ----------------------------------------------------------------------------
+// custom message handlers
+// ----------------------------------------------------------------------------
+
+/* static */ bool
+wxWindowMSW::MSWRegisterMessageHandler(int msg, MSWMessageHandler handler)
+{
+    wxCHECK_MSG( gs_messageHandlers.find(msg) == gs_messageHandlers.end(),
+                 false, _T("registering handler for the same message twice") );
+
+    gs_messageHandlers[msg] = handler;
+    return true;
+}
+
+/* static */ void
+wxWindowMSW::MSWUnregisterMessageHandler(int msg, MSWMessageHandler handler)
+{
+    const MSWMessageHandlers::iterator i = gs_messageHandlers.find(msg);
+    wxCHECK_RET( i != gs_messageHandlers.end() && i->second == handler,
+                 _T("unregistering non-registered handler?") );
+
+    gs_messageHandlers.erase(i);
+}
+
 // ===========================================================================
 // global functions
 // ===========================================================================
@@ -5780,6 +6003,10 @@ wxMouseState wxGetMouseState()
     ms.SetLeftDown(wxIsKeyDown(VK_LBUTTON));
     ms.SetMiddleDown(wxIsKeyDown(VK_MBUTTON));
     ms.SetRightDown(wxIsKeyDown(VK_RBUTTON));
+#ifdef wxHAS_XBUTTON
+    ms.SetAux1Down(wxIsKeyDown(VK_XBUTTON1));
+    ms.SetAux2Down(wxIsKeyDown(VK_XBUTTON2));
+#endif // wxHAS_XBUTTON
 
     ms.SetControlDown(wxIsKeyDown(VK_CONTROL));
     ms.SetShiftDown(wxIsKeyDown(VK_SHIFT));
@@ -6110,6 +6337,9 @@ const wxChar *wxGetMessageName(int message)
         case 0x0208: return wxT("WM_MBUTTONUP");
         case 0x0209: return wxT("WM_MBUTTONDBLCLK");
         case 0x020A: return wxT("WM_MOUSEWHEEL");
+        case 0x020B: return wxT("WM_XBUTTONDOWN");
+        case 0x020C: return wxT("WM_XBUTTONUP");
+        case 0x020D: return wxT("WM_XBUTTONDBLCLK");
         case 0x0210: return wxT("WM_PARENTNOTIFY");
         case 0x0211: return wxT("WM_ENTERMENULOOP");
         case 0x0212: return wxT("WM_EXITMENULOOP");
@@ -6600,7 +6830,7 @@ public:
         }
 
         return CallNextHookEx(ms_hMsgHookProc, nCode, wParam, lParam);
-    };
+    }
 
 private:
     static HHOOK ms_hMsgHookProc;