KB168123 - FIX: CWindow::GetTopLevelWindow() Returns NULL

RESOLUTION

Change the function in AtlWin.cpp from:

   HWND CWindow::GetTopLevelWindow() const
   {
      ...
      while(hWndTmp != NULL)
      {
         hWndTmp = (::GetWindowLong(hWndParent, GWL_STYLE) & WS_CHILD) ?
            ::GetParent(hWndParent) :
            ::GetWindow(hWndParent, GW_OWNER);

         hWndParent = hWndTmp;
      }

      return hWndParent;
   }

to the following: HWND CWindow::GetTopLevelWindow() const { ... while(hWndTmp != NULL) { // Modification hWndParent = hWndTmp; hWndTmp = (::GetWindowLong(hWndParent, GWL_STYLE) & WS_CHILD) ? ::GetParent(hWndParent) : ::GetWindow(hWndParent, GW_OWNER); } return hWndParent; }

FIX: CWindow::GetTopLevelWindow() Returns NULL

SYMPTOMS

CAUSE

RESOLUTION

STATUS