]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/ole/access.cpp
A slightly modified version of Patch #1197468. Keeps track of pending
[wxWidgets.git] / src / msw / ole / access.cpp
index 3bc308ca4789ddef3ae4eedaa4f4674ed9d66970..47cbf00934b55af419047acdf46c66a6d713d308 100644 (file)
@@ -17,7 +17,7 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
   #pragma implementation "access.h"
 #endif
 
@@ -38,7 +38,7 @@
 #include "wx/log.h"
 #include "wx/access.h"
 
-#include <windows.h>
+#include "wx/msw/wrapwin.h"
 
 // for some compilers, the entire ole2.h must be included, not only oleauto.h
 #if wxUSE_NORLANDER_HEADERS || defined(__WATCOMC__)
@@ -47,6 +47,7 @@
 
 #include <oleauto.h>
 #include <oleacc.h>
+#include <winable.h>
 
 #include "wx/msw/ole/oleutils.h"
 
@@ -78,7 +79,7 @@ class wxIEnumVARIANT : public IEnumVARIANT
 {
 public:
     wxIEnumVARIANT(const wxVariant& variant);
-    ~wxIEnumVARIANT() { }
+    virtual ~wxIEnumVARIANT() { }
 
     DECLARE_IUNKNOWN_METHODS;
 
@@ -198,12 +199,12 @@ public:
 // Navigation and Hierarchy
 
         // Retrieves the child element or child object at a given point on the screen.
-        // All visual objects support this method; sound objects do not support it.    
+        // All visual objects support this method; sound objects do not support it.
 
     STDMETHODIMP accHitTest(long xLeft, long yLeft, VARIANT* pVarID);
 
         // Retrieves the specified object's current screen location. All visual objects must
-        // support this method; sound objects do not support it.    
+        // support this method; sound objects do not support it.
 
     STDMETHODIMP accLocation ( long* pxLeft, long* pyTop, long* pcxWidth, long* pcyHeight, VARIANT varID);
 
@@ -214,29 +215,29 @@ public:
 
         // Retrieves the address of an IDispatch interface for the specified child.
         // All objects must support this property.
-    
+
     STDMETHODIMP get_accChild ( VARIANT varChildID, IDispatch** ppDispChild);
 
         // Retrieves the number of children that belong to this object.
         // All objects must support this property.
-    
+
     STDMETHODIMP get_accChildCount ( long* pCountChildren);
 
         // Retrieves the IDispatch interface of the object's parent.
         // All objects support this property.
-    
+
     STDMETHODIMP get_accParent ( IDispatch** ppDispParent);
 
 // Descriptive Properties and Methods
 
         // Performs the object's default action. Not all objects have a default
         // action.
-    
+
     STDMETHODIMP accDoDefaultAction(VARIANT varID);
 
         // Retrieves a string that describes the object's default action.
         // Not all objects have a default action.
-    
+
     STDMETHODIMP get_accDefaultAction ( VARIANT varID, BSTR* pszDefaultAction);
 
         // Retrieves a string that describes the visual appearance of the specified object.
@@ -252,18 +253,18 @@ public:
         // Retrieves the full path of the WinHelp file associated with the specified
         // object and the identifier of the appropriate topic within that file.
         // Not all objects support this property.
-        
+
     STDMETHODIMP get_accHelpTopic ( BSTR* pszHelpFile, VARIANT varChild, long* pidTopic);
 
         // Retrieves the specified object's shortcut key or access key, also known as
         // the mnemonic. All objects that have a shortcut key or access key support
         // this property.
-        
+
     STDMETHODIMP get_accKeyboardShortcut ( VARIANT varID, BSTR* pszKeyboardShortcut);
 
         // Retrieves the name of the specified object.
         // All objects support this property.
-    
+
     STDMETHODIMP get_accName ( VARIANT varID, BSTR* pszName);
 
         // Retrieves information that describes the role of the specified object.
@@ -273,9 +274,9 @@ public:
 
         // Retrieves the current state of the specified object.
         // All objects support this property.
-    
+
     STDMETHODIMP get_accState ( VARIANT varID, VARIANT* pVarState);
-    
+
         // Retrieves the value of the specified object.
         // Not all objects have a value.
 
@@ -291,12 +292,12 @@ public:
 
         // Retrieves the object that has the keyboard focus. All objects
         // that receive the keyboard focus must support this property.
-        
+
     STDMETHODIMP get_accFocus ( VARIANT* pVarID);
 
         // Retrieves the selected children of this object. All objects
         // selected must support this property.
-        
+
     STDMETHODIMP get_accSelection ( VARIANT * pVarChildren);
 
 // Obsolete
@@ -321,11 +322,21 @@ public:
 
         // Invoke
 
-    STDMETHODIMP Invoke(DISPID dispIdMember, REFIID riid, LCID lcid, 
-                        WORD wFlags, DISPPARAMS *pDispParams, 
-                        VARIANT *pVarResult, EXCEPINFO *pExcepInfo, 
+    STDMETHODIMP Invoke(DISPID dispIdMember, REFIID riid, LCID lcid,
+                        WORD wFlags, DISPPARAMS *pDispParams,
+                        VARIANT *pVarResult, EXCEPINFO *pExcepInfo,
                         unsigned int *puArgErr );
 
+// Helpers
+
+    // Gets the standard IAccessible interface for the given child or object.
+    // Call Release if this is non-NULL.
+    IAccessible* GetChildStdAccessible(int id);
+
+    // Gets the IAccessible interface for the given child or object.
+    // Call Release if this is non-NULL.
+    IAccessible* GetChildAccessible(int id);
+
 private:
     wxAccessible *m_pAccessible;      // pointer to C++ class we belong to
 
@@ -355,33 +366,34 @@ wxIAccessible::wxIAccessible(wxAccessible *pAccessible)
 }
 
 // Retrieves the child element or child object at a given point on the screen.
-// All visual objects support this method; sound objects do not support it.    
+// All visual objects support this method; sound objects do not support it.
 
 STDMETHODIMP wxIAccessible::accHitTest(long xLeft, long yLeft, VARIANT* pVarID)
 {
+    wxLogTrace(wxT("access"), wxT("accHitTest"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     wxAccessible* childObject = NULL;
     int childId = 0;
     VariantInit(pVarID);
-    
+
     wxAccStatus status = m_pAccessible->HitTest(wxPoint(xLeft, yLeft), & childId, & childObject);
-    
+
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
             return stdInterface->accHitTest(xLeft, yLeft, pVarID);
     }
-    
+
     if (childObject)
     {
         if (childObject == m_pAccessible)
@@ -394,13 +406,12 @@ STDMETHODIMP wxIAccessible::accHitTest(long xLeft, long yLeft, VARIANT* pVarID)
         {
             wxIAccessible* childIA = childObject->GetIAccessible();
             if (!childIA)
+                return E_NOTIMPL;
+
+            if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) & pVarID->pdispVal) != S_OK)
                 return E_FAIL;
 
-               if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) pVarID->pdispVal) != S_OK)
-                   return E_FAIL;
-            
             pVarID->vt = VT_DISPATCH;
-            pVarID->pdispVal->AddRef();
             return S_OK;
         }
     }
@@ -415,33 +426,48 @@ STDMETHODIMP wxIAccessible::accHitTest(long xLeft, long yLeft, VARIANT* pVarID)
         pVarID->vt = VT_EMPTY;
         return S_FALSE;
     }
-    
-    return E_FAIL;
+
+    #if 0
+    // all cases above already cause some return action so below line
+    // is unreachable and cause unnecessary warning
+    return E_NOTIMPL;
+    #endif
 }
 
 // Retrieves the specified object's current screen location. All visual objects must
-// support this method; sound objects do not support it.    
+// support this method; sound objects do not support it.
 
 STDMETHODIMP wxIAccessible::accLocation ( long* pxLeft, long* pyTop, long* pcxWidth, long* pcyHeight, VARIANT varID)
 {
+    wxLogTrace(wxT("access"), wxT("accLocation"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     wxRect rect;
 
     wxAccStatus status = m_pAccessible->GetLocation(rect, varID.lVal);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->accLocation(pxLeft, pyTop, pcxWidth, pcyHeight, varID);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->accLocation(pxLeft, pyTop, pcxWidth, pcyHeight, varID);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accLocation(pxLeft, pyTop, pcxWidth, pcyHeight, varID);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accLocation(pxLeft, pyTop, pcxWidth, pcyHeight, varID);
     }
     else
     {
@@ -452,7 +478,7 @@ STDMETHODIMP wxIAccessible::accLocation ( long* pxLeft, long* pyTop, long* pcxWi
         return S_OK;
     }
 
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Traverses to another user interface element within a container and retrieves the object.
@@ -463,107 +489,169 @@ STDMETHODIMP wxIAccessible::accNavigate ( long navDir, VARIANT varStart, VARIANT
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-
-    if (varStart.vt != VT_I4)
+    wxLogTrace(wxT("access"), wxString(wxT("accNavigate for ")) + m_pAccessible->GetWindow()->GetClassInfo()->GetClassName());
+
+    if ((varStart.vt != VT_I4 && varStart.vt != VT_EMPTY)
+                                                          #if 0
+                                                          // according to MSDN and sources varStart.vt is unsigned
+                                                          // so below line cause warning "Condition is always false"
+                                                          || varStart.vt < 0
+                                                          #endif
+                                                          )
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for accNavigate"));
         return E_INVALIDARG;
-    
+    }
+
     wxAccessible* elementObject = NULL;
     int elementId = 0;
     VariantInit(pVarEnd);
     wxNavDir navDirWX = wxNAVDIR_FIRSTCHILD;
 
+    wxString navStr;
+
     switch (navDir)
     {
     case NAVDIR_DOWN:
         navDirWX = wxNAVDIR_DOWN;
+        navStr = wxT("wxNAVDIR_DOWN");
         break;
 
     case NAVDIR_FIRSTCHILD:
         navDirWX = wxNAVDIR_FIRSTCHILD;
+        navStr = wxT("wxNAVDIR_FIRSTCHILD");
         break;
 
     case NAVDIR_LASTCHILD:
         navDirWX = wxNAVDIR_LASTCHILD;
+        navStr = wxT("wxNAVDIR_LASTCHILD");
         break;
 
     case NAVDIR_LEFT:
         navDirWX = wxNAVDIR_LEFT;
+        navStr = wxT("wxNAVDIR_LEFT");
         break;
 
     case NAVDIR_NEXT:
         navDirWX = wxNAVDIR_NEXT;
+        navStr = wxT("wxNAVDIR_NEXT");
         break;
 
     case NAVDIR_PREVIOUS:
         navDirWX = wxNAVDIR_PREVIOUS;
+        navStr = wxT("wxNAVDIR_PREVIOUS");
         break;
 
     case NAVDIR_RIGHT:
         navDirWX = wxNAVDIR_RIGHT;
+        navStr = wxT("wxNAVDIR_RIGHT");
         break;
 
     case NAVDIR_UP:
         navDirWX = wxNAVDIR_UP;
+        navStr = wxT("wxNAVDIR_UP");
         break;
+    default:
+        {
+            wxLogTrace(wxT("access"), wxT("Unknown NAVDIR symbol"));
+            break;
+        }
     }
-    
+    wxLogTrace(wxT("access"), navStr);
+
     wxAccStatus status = m_pAccessible->Navigate(navDirWX, varStart.lVal, & elementId,
         & elementObject);
 
     if (status == wxACC_FAIL)
+    {
+        wxLogTrace(wxT("access"), wxT("wxAccessible::Navigate failed"));
         return E_FAIL;
-    
+    }
+
+    if (status == wxACC_FALSE)
+    {
+        wxLogTrace(wxT("access"), wxT("wxAccessible::Navigate found no object in this direction"));
+        return S_FALSE;
+    }
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->accNavigate ( navDir, varStart, pVarEnd);
+        wxLogTrace(wxT("access"), wxT("Navigate not implemented"));
+
+        // Try to use child object directly.
+        if (varStart.vt == VT_I4 && varStart.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varStart.lVal);
+            if (childAccessible)
+            {
+                varStart.lVal = 0;
+                HRESULT hResult = childAccessible->accNavigate(navDir, varStart, pVarEnd);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accNavigate(navDir, varStart, pVarEnd);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accNavigate(navDir, varStart, pVarEnd);
     }
     else
     {
         if (elementObject)
         {
+            wxLogTrace(wxT("access"), wxT("Getting wxIAccessible and calling QueryInterface for Navigate"));
             wxIAccessible* objectIA = elementObject->GetIAccessible();
             if (!objectIA)
+            {
+                wxLogTrace(wxT("access"), wxT("No wxIAccessible"));
+                return E_FAIL;
+            }
+
+            HRESULT hResult = objectIA->QueryInterface(IID_IDispatch, (LPVOID*) & pVarEnd->pdispVal);
+            if (hResult != S_OK)
+            {
+                wxLogTrace(wxT("access"), wxT("QueryInterface failed"));
                 return E_FAIL;
+            }
 
-               if (objectIA->QueryInterface(IID_IDispatch, (LPVOID*) pVarEnd->pdispVal) != S_OK)
-                   return E_FAIL;
-            
+            wxLogTrace(wxT("access"), wxT("Called QueryInterface for Navigate"));
             pVarEnd->vt = VT_DISPATCH;
-            pVarEnd->pdispVal->AddRef();
             return S_OK;
         }
         else if (elementId > 0)
         {
+            wxLogTrace(wxT("access"), wxT("Returning element id from Navigate"));
             pVarEnd->vt = VT_I4;
             pVarEnd->lVal = elementId;
             return S_OK;
         }
         else
         {
+            wxLogTrace(wxT("access"), wxT("No object in accNavigate"));
             pVarEnd->vt = VT_EMPTY;
             return S_FALSE;
         }
     }
 
-    return E_FAIL;
+    wxLogTrace(wxT("access"), wxT("Failing Navigate"));
+    return E_NOTIMPL;
 }
 
 // Retrieves the address of an IDispatch interface for the specified child.
 // All objects must support this property.
-    
+
 STDMETHODIMP wxIAccessible::get_accChild ( VARIANT varChildID, IDispatch** ppDispChild)
 {
+    wxLogTrace(wxT("access"), wxT("get_accChild"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varChildID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accChild"));
         return E_INVALIDARG;
+    }
 
     if (varChildID.lVal == CHILDID_SELF)
     {
@@ -571,21 +659,27 @@ STDMETHODIMP wxIAccessible::get_accChild ( VARIANT varChildID, IDispatch** ppDis
         AddRef();
         return S_OK;
     }
-    
+
     wxAccessible* child = NULL;
 
     wxAccStatus status = m_pAccessible->GetChild(varChildID.lVal, & child);
     if (status == wxACC_FAIL)
+    {
+        wxLogTrace(wxT("access"), wxT("GetChild failed"));
         return E_FAIL;
-    
+    }
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
+        {
+            wxLogTrace(wxT("access"), wxT("Using standard interface for get_accChild"));
             return stdInterface->get_accChild (varChildID, ppDispChild);
+        }
     }
     else
     {
@@ -593,40 +687,60 @@ STDMETHODIMP wxIAccessible::get_accChild ( VARIANT varChildID, IDispatch** ppDis
         {
             wxIAccessible* objectIA = child->GetIAccessible();
             if (!objectIA)
+                return E_NOTIMPL;
+
+            if (objectIA->QueryInterface(IID_IDispatch, (LPVOID*) ppDispChild) != S_OK)
+            {
+                wxLogTrace(wxT("access"), wxT("QueryInterface failed in get_accChild"));
                 return E_FAIL;
-            *ppDispChild = objectIA;
-            objectIA->AddRef();
+            }
+
             return S_OK;
         }
         else
+        {
+            wxLogTrace(wxT("access"), wxT("Not an accessible object"));
             return S_FALSE; // Indicates it's not an accessible object
+        }
     }
 
-    return E_FAIL;
+    #if 0
+    // all cases above already cause some return action so below line
+    // is unreachable and cause unnecessary warning
+    return E_NOTIMPL;
+    #endif
 }
 
 // Retrieves the number of children that belong to this object.
 // All objects must support this property.
-    
+
 STDMETHODIMP wxIAccessible::get_accChildCount ( long* pCountChildren)
 {
+    wxLogTrace(wxT("access"), wxT("get_accChildCount"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     int childCount = 0;
     wxAccStatus status = m_pAccessible->GetChildCount(& childCount);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
-            return stdInterface->get_accChildCount (pCountChildren);
+        {
+            wxLogTrace(wxT("access"), wxT("Using standard interface for get_accChildCount"));
+            HRESULT res = stdInterface->get_accChildCount (pCountChildren);
+            wxString str;
+            str.Printf(wxT("Number of children was %d"), (int) (*pCountChildren));
+            wxLogTrace(wxT("access"), str);
+            return res;
+        }
     }
     else
     {
@@ -634,29 +748,39 @@ STDMETHODIMP wxIAccessible::get_accChildCount ( long* pCountChildren)
         return S_OK;
     }
 
-    return E_FAIL;
+    #if 0
+    // all cases above already cause some return action so below line
+    // is unreachable and cause unnecessary warning
+    return E_NOTIMPL;
+    #endif
 }
 
 // Retrieves the IDispatch interface of the object's parent.
 // All objects support this property.
-    
+
 STDMETHODIMP wxIAccessible::get_accParent ( IDispatch** ppDispParent)
 {
+    wxLogTrace(wxT("access"), wxT("get_accParent"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     wxAccessible* parent = NULL;
     wxAccStatus status = m_pAccessible->GetParent(& parent);
+
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
-    if (status == wxACC_NOT_IMPLEMENTED)
+
+    // It doesn't seem acceptable to return S_FALSE with a NULL
+    // ppDispParent, so if we have no wxWidgets parent, we leave
+    // it to the standard interface.
+    if (status == wxACC_NOT_IMPLEMENTED || !parent)
     {
+        wxLogTrace(wxT("access"), wxT("Using standard interface to get the parent."));
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
             return stdInterface->get_accParent (ppDispParent);
     }
@@ -668,89 +792,120 @@ STDMETHODIMP wxIAccessible::get_accParent ( IDispatch** ppDispParent)
             if (!objectIA)
                 return E_FAIL;
 
-               if (objectIA->QueryInterface(IID_IDispatch, (LPVOID*) ppDispParent) != S_OK)
-                   return E_FAIL;
-            
-            (*ppDispParent)->AddRef();
-            return S_OK;
-/*
-            wxIAccessible* objectIA = parent->GetIAccessible();
-            if (!objectIA)
+            wxLogTrace(wxT("access"), wxT("About to call QueryInterface"));
+            if (objectIA->QueryInterface(IID_IDispatch, (LPVOID*) ppDispParent) != S_OK)
+            {
+                wxLogTrace(wxT("access"), wxT("Failed QueryInterface"));
                 return E_FAIL;
-            objectIA->AddRef();
-            *ppDispParent = objectIA;
+            }
+
+            wxLogTrace(wxT("access"), wxT("Returning S_OK for get_accParent"));
             return S_OK;
-*/
         }
         else
         {
+            // This doesn't seem to be allowed, despite the documentation,
+            // so we handle it higher up by using the standard interface.
+            wxLogTrace(wxT("access"), wxT("Returning NULL parent because there was none"));
             *ppDispParent = NULL;
-            return S_OK;
+            return S_FALSE;
         }
     }
 
-    return E_FAIL;
+    #if 0
+    // all cases above already cause some return action so below line
+    // is unreachable and cause unnecessary warning
+    return E_NOTIMPL;
+    #endif
 }
 
 // Performs the object's default action. Not all objects have a default
 // action.
-    
+
 STDMETHODIMP wxIAccessible::accDoDefaultAction(VARIANT varID)
 {
+    wxLogTrace(wxT("access"), wxT("accDoDefaultAction"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for accDoDefaultAction"));
         return E_INVALIDARG;
-    
+    }
+
     wxAccStatus status = m_pAccessible->DoDefaultAction(varID.lVal);
     if (status == wxACC_FAIL)
         return E_FAIL;
 
     if (status == wxACC_NOT_SUPPORTED)
         return DISP_E_MEMBERNOTFOUND;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->accDoDefaultAction(varID);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->accDoDefaultAction(varID);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accDoDefaultAction(varID);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accDoDefaultAction(varID);
     }
     return E_FAIL;
 }
 
 // Retrieves a string that describes the object's default action.
 // Not all objects have a default action.
-    
+
 STDMETHODIMP wxIAccessible::get_accDefaultAction ( VARIANT varID, BSTR* pszDefaultAction)
 {
+    wxLogTrace(wxT("access"), wxT("get_accDefaultAction"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accDefaultAction"));
         return E_INVALIDARG;
-    
+    }
+
     wxString defaultAction;
     wxAccStatus status = m_pAccessible->GetDefaultAction(varID.lVal, & defaultAction);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_SUPPORTED)
         return DISP_E_MEMBERNOTFOUND;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accDefaultAction (varID, pszDefaultAction);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accDefaultAction(varID, pszDefaultAction);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accDefaultAction(varID, pszDefaultAction);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accDefaultAction(varID, pszDefaultAction);
     }
     else
     {
@@ -774,26 +929,40 @@ STDMETHODIMP wxIAccessible::get_accDefaultAction ( VARIANT varID, BSTR* pszDefau
 
 STDMETHODIMP wxIAccessible::get_accDescription ( VARIANT varID, BSTR* pszDescription)
 {
+    wxLogTrace(wxT("access"), wxT("get_accDescription"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accDescription"));
         return E_INVALIDARG;
-    
+    }
+
     wxString description;
     wxAccStatus status = m_pAccessible->GetDescription(varID.lVal, & description);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accDescription (varID, pszDescription);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accDescription(varID, pszDescription);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accDescription(varID, pszDescription);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accDescription(varID, pszDescription);
     }
     else
     {
@@ -807,9 +976,9 @@ STDMETHODIMP wxIAccessible::get_accDescription ( VARIANT varID, BSTR* pszDescrip
             wxBasicString basicString(description);
             * pszDescription = basicString.Get();
             return S_OK;
-        }        
+        }
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves an object's Help property string.
@@ -817,26 +986,40 @@ STDMETHODIMP wxIAccessible::get_accDescription ( VARIANT varID, BSTR* pszDescrip
 
 STDMETHODIMP wxIAccessible::get_accHelp ( VARIANT varID, BSTR* pszHelp)
 {
+    wxLogTrace(wxT("access"), wxT("get_accHelp"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accHelp"));
         return E_INVALIDARG;
-    
+    }
+
     wxString helpString;
     wxAccStatus status = m_pAccessible->GetHelpText(varID.lVal, & helpString);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accHelp (varID, pszHelp);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accHelp(varID, pszHelp);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accHelp(varID, pszHelp);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accHelp (varID, pszHelp);
     }
     else
     {
@@ -850,70 +1033,98 @@ STDMETHODIMP wxIAccessible::get_accHelp ( VARIANT varID, BSTR* pszHelp)
             wxBasicString basicString(helpString);
             * pszHelp = basicString.Get();
             return S_OK;
-        }        
+        }
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves the full path of the WinHelp file associated with the specified
 // object and the identifier of the appropriate topic within that file.
 // Not all objects support this property.
-// NOTE: not supported by wxWindows at this time. Use
+// NOTE: not supported by wxWidgets at this time. Use
 // GetHelpText instead.
-        
+
 STDMETHODIMP wxIAccessible::get_accHelpTopic ( BSTR* pszHelpFile, VARIANT varChild, long* pidTopic)
 {
+    wxLogTrace(wxT("access"), wxT("get_accHelpTopic"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varChild.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accHelpTopic"));
         return E_INVALIDARG;
-    
+    }
+
     wxAccStatus status = wxACC_NOT_IMPLEMENTED;
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accHelpTopic (pszHelpFile, varChild, pidTopic);
+        // Try to use child object directly.
+        if (varChild.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varChild.lVal);
+            if (childAccessible)
+            {
+                varChild.lVal = 0;
+                HRESULT hResult = childAccessible->get_accHelpTopic(pszHelpFile, varChild, pidTopic);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accHelpTopic(pszHelpFile, varChild, pidTopic);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accHelpTopic (pszHelpFile, varChild, pidTopic);
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves the specified object's shortcut key or access key, also known as
 // the mnemonic. All objects that have a shortcut key or access key support
 // this property.
-        
+
 STDMETHODIMP wxIAccessible::get_accKeyboardShortcut ( VARIANT varID, BSTR* pszKeyboardShortcut)
 {
+    wxLogTrace(wxT("access"), wxT("get_accKeyboardShortcut"));
     *pszKeyboardShortcut = NULL;
 
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accKeyboardShortcut"));
         return E_INVALIDARG;
-    
+    }
+
     wxString keyboardShortcut;
-    wxAccStatus status = m_pAccessible->GetHelpText(varID.lVal, & keyboardShortcut);
+    wxAccStatus status = m_pAccessible->GetKeyboardShortcut(varID.lVal, & keyboardShortcut);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accKeyboardShortcut(varID, pszKeyboardShortcut);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accKeyboardShortcut(varID, pszKeyboardShortcut);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accKeyboardShortcut(varID, pszKeyboardShortcut);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accKeyboardShortcut (varID, pszKeyboardShortcut);
     }
     else
     {
@@ -927,16 +1138,17 @@ STDMETHODIMP wxIAccessible::get_accKeyboardShortcut ( VARIANT varID, BSTR* pszKe
             wxBasicString basicString(keyboardShortcut);
             * pszKeyboardShortcut = basicString.Get();
             return S_OK;
-        }        
+        }
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves the name of the specified object.
 // All objects support this property.
-    
+
 STDMETHODIMP wxIAccessible::get_accName ( VARIANT varID, BSTR* pszName)
 {
+    wxLogTrace(wxT("access"), wxT("get_accName"));
     *pszName = NULL;
 
     wxASSERT (m_pAccessible != NULL);
@@ -944,23 +1156,36 @@ STDMETHODIMP wxIAccessible::get_accName ( VARIANT varID, BSTR* pszName)
         return E_FAIL;
 
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accName"));
         return E_INVALIDARG;
-    
+    }
+
     wxString name;
-    
+
     wxAccStatus status = m_pAccessible->GetName(varID.lVal, & name);
-    
+
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accName (varID, pszName);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accName(varID, pszName);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accName(varID, pszName);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accName (varID, pszName);
     }
     else
     {
@@ -968,7 +1193,7 @@ STDMETHODIMP wxIAccessible::get_accName ( VARIANT varID, BSTR* pszName)
         *pszName = basicString.Get();
         return S_OK;
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves information that describes the role of the specified object.
@@ -976,30 +1201,44 @@ STDMETHODIMP wxIAccessible::get_accName ( VARIANT varID, BSTR* pszName)
 
 STDMETHODIMP wxIAccessible::get_accRole ( VARIANT varID, VARIANT* pVarRole)
 {
+    wxLogTrace(wxT("access"), wxT("get_accRole"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accRole"));
         return E_INVALIDARG;
-    
+    }
+
     VariantInit(pVarRole);
 
     wxAccRole role = wxROLE_NONE;
-    
+
     wxAccStatus status = m_pAccessible->GetRole(varID.lVal, & role);
-    
+
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accRole (varID, pVarRole);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accRole(varID, pVarRole);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accRole(varID, pVarRole);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accRole (varID, pVarRole);
     }
     else
     {
@@ -1014,35 +1253,49 @@ STDMETHODIMP wxIAccessible::get_accRole ( VARIANT varID, VARIANT* pVarRole)
 
         return S_OK;
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves the current state of the specified object.
 // All objects support this property.
-    
+
 STDMETHODIMP wxIAccessible::get_accState ( VARIANT varID, VARIANT* pVarState)
 {
+    wxLogTrace(wxT("access"), wxT("get_accState"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
-    if (varID.vt != VT_I4)
+
+    if (varID.vt != VT_I4 && varID.vt != VT_EMPTY)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accState"));
         return E_INVALIDARG;
+    }
 
     long wxstate = 0;
-    
+
     wxAccStatus status = m_pAccessible->GetState(varID.lVal, & wxstate);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accState (varID, pVarState);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accState(varID, pVarState);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accState(varID, pVarState);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accState (varID, pVarState);
     }
     else
     {
@@ -1051,36 +1304,50 @@ STDMETHODIMP wxIAccessible::get_accState ( VARIANT varID, VARIANT* pVarState)
         pVarState->vt = VT_I4;
         return S_OK;
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
-    
+
 // Retrieves the value of the specified object.
 // Not all objects have a value.
 
 STDMETHODIMP wxIAccessible::get_accValue ( VARIANT varID, BSTR* pszValue)
 {
+    wxLogTrace(wxT("access"), wxT("get_accValue"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     if (varID.vt != VT_I4)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for get_accValue"));
         return E_INVALIDARG;
-    
+    }
+
     wxString strValue;
-    
+
     wxAccStatus status = m_pAccessible->GetValue(varID.lVal, & strValue);
-    
+
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->get_accValue (varID, pszValue);
+        // Try to use child object directly.
+        if (varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->get_accValue(varID, pszValue);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accValue(varID, pszValue);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->get_accValue (varID, pszValue);
     }
     else
     {
@@ -1088,7 +1355,7 @@ STDMETHODIMP wxIAccessible::get_accValue ( VARIANT varID, BSTR* pszValue)
         * pszValue = basicString.Get();
         return S_OK;
     }
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Modifies the selection or moves the keyboard focus of the
@@ -1097,57 +1364,72 @@ STDMETHODIMP wxIAccessible::get_accValue ( VARIANT varID, BSTR* pszValue)
 
 STDMETHODIMP wxIAccessible::accSelect ( long flagsSelect, VARIANT varID )
 {
+    wxLogTrace(wxT("access"), wxT("get_accSelect"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
-    if (varID.vt != VT_I4)
+
+    if (varID.vt != VT_I4 && varID.vt != VT_EMPTY)
+    {
+        wxLogTrace(wxT("access"), wxT("Invalid arg for accSelect"));
         return E_INVALIDARG;
-    
+    }
+
     wxAccSelectionFlags wxsel = wxConvertFromWindowsSelFlag(flagsSelect);
 
     wxAccStatus status = m_pAccessible->Select(varID.lVal, wxsel);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
-        // Use standard interface instead.
-        IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
-        if (!stdInterface)
-            return E_FAIL;
-        else
-            return stdInterface->accSelect ( flagsSelect, varID );
+        // Try to use child object directly.
+        if (varID.lVal > 0 && varID.lVal > 0)
+        {
+            IAccessible* childAccessible = GetChildAccessible(varID.lVal);
+            if (childAccessible)
+            {
+                varID.lVal = 0;
+                HRESULT hResult = childAccessible->accSelect(flagsSelect, varID);
+                childAccessible->Release();
+                return hResult;
+            }
+            else if (m_pAccessible->GetIAccessibleStd())
+                return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accSelect(flagsSelect, varID);
+        }
+        else if (m_pAccessible->GetIAccessibleStd())
+            return ((IAccessible*) m_pAccessible->GetIAccessibleStd())->accSelect(flagsSelect, varID);
     }
     else
         return S_OK;
 
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Retrieves the object that has the keyboard focus. All objects
 // that receive the keyboard focus must support this property.
-        
+
 STDMETHODIMP wxIAccessible::get_accFocus ( VARIANT* pVarID)
 {
+    wxLogTrace(wxT("access"), wxT("get_accFocus"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
-    
+
     wxAccessible* childObject = NULL;
     int childId = 0;
     VariantInit(pVarID);
-    
+
     wxAccStatus status = m_pAccessible->GetFocus(& childId, & childObject);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
             return stdInterface->get_accFocus (pVarID);
     }
@@ -1157,19 +1439,17 @@ STDMETHODIMP wxIAccessible::get_accFocus ( VARIANT* pVarID)
         {
             pVarID->vt = VT_I4;
             pVarID->lVal = CHILDID_SELF;
-            return S_OK;
-        }
+            return S_OK;        }
         else
         {
             wxIAccessible* childIA = childObject->GetIAccessible();
             if (!childIA)
+                return E_NOTIMPL;
+
+            if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) & pVarID->pdispVal) != S_OK)
                 return E_FAIL;
 
-               if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) pVarID->pdispVal) != S_OK)
-                   return E_FAIL;
-            
             pVarID->vt = VT_DISPATCH;
-            pVarID->pdispVal->AddRef();
             return S_OK;
         }
     }
@@ -1184,32 +1464,37 @@ STDMETHODIMP wxIAccessible::get_accFocus ( VARIANT* pVarID)
         pVarID->vt = VT_EMPTY;
         return S_FALSE;
     }
-    
-    return E_FAIL;
+
+    #if 0
+    // all cases above already cause some return action so below line
+    // is unreachable and cause unnecessary warning
+    return E_NOTIMPL;
+    #endif
 }
 
 // Retrieves the selected children of this object. All objects
 // selected must support this property.
-        
+
 STDMETHODIMP wxIAccessible::get_accSelection ( VARIANT * pVarChildren)
 {
+    wxLogTrace(wxT("access"), wxT("get_accSelection"));
     wxASSERT (m_pAccessible != NULL);
     if (!m_pAccessible)
         return E_FAIL;
 
     VariantInit(pVarChildren);
-    
+
     wxVariant selections;
     wxAccStatus status = m_pAccessible->GetSelections(& selections);
     if (status == wxACC_FAIL)
         return E_FAIL;
-    
+
     if (status == wxACC_NOT_IMPLEMENTED)
     {
         // Use standard interface instead.
         IAccessible* stdInterface = (IAccessible*)m_pAccessible->GetIAccessibleStd();
         if (!stdInterface)
-            return E_FAIL;
+            return E_NOTIMPL;
         else
             return stdInterface->get_accSelection (pVarChildren);
     }
@@ -1227,13 +1512,12 @@ STDMETHODIMP wxIAccessible::get_accSelection ( VARIANT * pVarChildren)
             wxAccessible* childObject = (wxAccessible*) selections.GetVoidPtr();
             wxIAccessible* childIA = childObject->GetIAccessible();
             if (!childIA)
+                return E_NOTIMPL;
+
+            if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) & pVarChildren->pdispVal) != S_OK)
                 return E_FAIL;
 
-               if (childIA->QueryInterface(IID_IDispatch, (LPVOID*) pVarChildren->pdispVal) != S_OK)
-                   return E_FAIL;
-            
             pVarChildren->vt = VT_DISPATCH;
-            pVarChildren->pdispVal->AddRef();
 
             return S_OK;
         }
@@ -1251,12 +1535,12 @@ STDMETHODIMP wxIAccessible::get_accSelection ( VARIANT * pVarChildren)
         }
     }
 
-    return E_FAIL;
+    return E_NOTIMPL;
 }
 
 // Get type info
 
-STDMETHODIMP wxIAccessible::GetTypeInfo(unsigned int typeInfo, LCID lcid, ITypeInfo** ppTypeInfo)
+STDMETHODIMP wxIAccessible::GetTypeInfo(unsigned int WXUNUSED(typeInfo), LCID WXUNUSED(lcid), ITypeInfo** ppTypeInfo)
 {
     *ppTypeInfo = NULL;
     return E_NOTIMPL;
@@ -1272,22 +1556,135 @@ STDMETHODIMP wxIAccessible::GetTypeInfoCount(unsigned int* typeInfoCount)
 
 // Get ids of names
 
-STDMETHODIMP wxIAccessible::GetIDsOfNames(REFIID riid, OLECHAR** names, unsigned int cNames,
-        LCID lcid, DISPID* dispId)
+STDMETHODIMP wxIAccessible::GetIDsOfNames(REFIID WXUNUSED(riid), OLECHAR** WXUNUSED(names), unsigned int WXUNUSED(cNames),
+        LCID WXUNUSED(lcid), DISPID* WXUNUSED(dispId))
 {
     return E_NOTIMPL;
 }
 
 // Invoke
 
-STDMETHODIMP wxIAccessible::Invoke(DISPID dispIdMember, REFIID riid, LCID lcid, 
-                        WORD wFlags, DISPPARAMS *pDispParams, 
-                        VARIANT *pVarResult, EXCEPINFO *pExcepInfo, 
-                        unsigned int *puArgErr )
+STDMETHODIMP wxIAccessible::Invoke(DISPID WXUNUSED(dispIdMember), REFIID WXUNUSED(riid), LCID WXUNUSED(lcid),
+                        WORD WXUNUSED(wFlags), DISPPARAMS *WXUNUSED(pDispParams),
+                        VARIANT *WXUNUSED(pVarResult), EXCEPINFO *WXUNUSED(pExcepInfo),
+                        unsigned int *WXUNUSED(puArgErr) )
 {
     return E_NOTIMPL;
 }
 
+// Gets the standard IAccessible interface for the given child or object.
+// Call Release if this is non-NULL.
+IAccessible* wxIAccessible::GetChildStdAccessible(int id)
+{
+    if (id == 0)
+    {
+        IAccessible* obj = (IAccessible*)m_pAccessible->GetIAccessibleStd();
+
+        obj->AddRef();
+        return obj;
+    }
+    else
+    {
+        VARIANT var;
+        VariantInit(& var);
+        var.vt = VT_I4;
+        var.lVal = id;
+        IDispatch* pDispatch = NULL;
+        if (S_OK == get_accChild ( var, & pDispatch))
+        {
+            IAccessible* childAccessible = NULL;
+            if (pDispatch->QueryInterface(IID_IAccessible, (LPVOID*) & childAccessible) == S_OK)
+            {
+                pDispatch->Release();
+                wxIAccessible* c = (wxIAccessible*) childAccessible;
+                IAccessible* stdChildAccessible = (IAccessible*) c->m_pAccessible->GetIAccessibleStd();
+                stdChildAccessible->AddRef();
+                childAccessible->Release();
+                return stdChildAccessible;
+            }
+            else
+            {
+                pDispatch->Release();
+            }
+        }
+    }
+
+#if 0
+    {
+        // Loop until we find the right id
+        long nChildren = 0;
+        this->get_accChildCount(& nChildren);
+
+        int i;
+        for (i = 0; i < nChildren; i++)
+        {
+            long obtained = 0;
+            VARIANT var;
+            VariantInit(& var);
+            var.vt = VT_I4;
+            if (S_OK == AccessibleChildren(this, i, 1, & var, &obtained))
+            {
+                if (var.lVal == id)
+                {
+                    VariantInit(& var);
+                    var.vt = VT_DISPATCH;
+                    if (S_OK == AccessibleChildren(this, i, 1, & var, &obtained))
+                    {
+                        IAccessible* childAccessible = NULL;
+                        if (var.pdispVal->QueryInterface(IID_IAccessible, (LPVOID*) & childAccessible) == S_OK)
+                        {
+                            var.pdispVal->Release();
+                            return childAccessible;
+                        }
+                        else
+                        {
+                            var.pdispVal->Release();
+                        }
+                    }
+                }
+                break;
+            }
+        }
+    }
+#endif
+    return NULL;
+}
+
+// Gets the IAccessible interface for the given child or object.
+// Call Release if this is non-NULL.
+IAccessible* wxIAccessible::GetChildAccessible(int id)
+{
+    if (id == 0)
+    {
+        IAccessible* obj = this;
+
+        obj->AddRef();
+        return obj;
+    }
+    else
+    {
+        VARIANT var;
+        VariantInit(& var);
+        var.vt = VT_I4;
+        var.lVal = id;
+        IDispatch* pDispatch = NULL;
+        if (S_OK == get_accChild ( var, & pDispatch))
+        {
+            IAccessible* childAccessible = NULL;
+            if (pDispatch->QueryInterface(IID_IAccessible, (LPVOID*) & childAccessible) == S_OK)
+            {
+                pDispatch->Release();
+                return childAccessible;
+            }
+            else
+            {
+                pDispatch->Release();
+            }
+        }
+    }
+    return NULL;
+}
+
 // ----------------------------------------------------------------------------
 // wxAccessible implementation
 // ----------------------------------------------------------------------------
@@ -1323,13 +1720,8 @@ void* wxAccessible::GetIAccessibleStd()
 
     if (GetWindow())
     {
-#if 0
-        HRESULT retCode = ::CreateStdAccessibleProxy((HWND) GetWindow()->GetHWND(),
-                wxT("wxWindowClass"), OBJID_CLIENT, IID_IAccessible, (void**) & m_pIAccessibleStd);
-#else
         HRESULT retCode = ::CreateStdAccessibleObject((HWND) GetWindow()->GetHWND(),
                 OBJID_CLIENT, IID_IAccessible, (void**) & m_pIAccessibleStd);
-#endif
         if (retCode == S_OK)
             return m_pIAccessibleStd;
         else
@@ -1341,6 +1733,14 @@ void* wxAccessible::GetIAccessibleStd()
     return NULL;
 }
 
+// Sends an event when something changes in an accessible object.
+void wxAccessible::NotifyEvent(int eventType, wxWindow* window, wxAccObject objectType,
+                        int objectId)
+{
+    ::NotifyWinEvent((DWORD) eventType, (HWND) window->GetHWND(),
+        (LONG) objectType, (LONG) objectId);
+}
+
 // Utilities
 
 // Convert to Windows role
@@ -1564,15 +1964,15 @@ int wxConvertToWindowsSelFlag(wxAccSelectionFlags wxsel)
 {
     int sel = 0;
 
-    if (sel & wxACC_SEL_TAKEFOCUS)
+    if (wxsel & wxACC_SEL_TAKEFOCUS)
         sel |= SELFLAG_TAKEFOCUS;
-    if (sel & wxACC_SEL_TAKESELECTION)
+    if (wxsel & wxACC_SEL_TAKESELECTION)
         sel |= SELFLAG_TAKESELECTION;
-    if (sel & wxACC_SEL_EXTENDSELECTION)
+    if (wxsel & wxACC_SEL_EXTENDSELECTION)
         sel |= SELFLAG_EXTENDSELECTION;
-    if (sel & wxACC_SEL_ADDSELECTION)
+    if (wxsel & wxACC_SEL_ADDSELECTION)
         sel |= SELFLAG_ADDSELECTION;
-    if (sel & wxACC_SEL_REMOVESELECTION)
+    if (wxsel & wxACC_SEL_REMOVESELECTION)
         sel |= SELFLAG_REMOVESELECTION;
     return sel;
 }