APIs for adding a thumbnail toolbar with a specified set of buttons.

- AddThumbBarButton(wxThumbBarButton *button), ShowThumbnailToolbar().
- Add THBN_CLICKED message handler to top level window and generate a
  wxCommandEvent event.
- Sample.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77575 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/frame.cpp

@@ -64,6 +64,10 @@
     extern wxMenu *wxCurrentPopupMenu;
 #endif // wxUSE_MENUS || wxUSE_MENUS_NATIVE
 
+#if wxUSE_TASKBARBUTTON
+    #define wxTHBN_CLICKED 0x1800
+#endif  // wxUSE_TASKBARBUTTON
+
 // ----------------------------------------------------------------------------
 // event tables
 // ----------------------------------------------------------------------------
@@ -862,6 +866,13 @@ bool wxFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND control)
     }
 #endif // wxUSE_MENUS
 
+#if wxUSE_TASKBARBUTTON
+    if ( cmd == wxTHBN_CLICKED && MSWGetTaskBarButton() )
+    {
+        return wxTopLevelWindowMSW::HandleTHBNClickedCommand(id);
+    }
+#endif // wxUSE_TASKBARBUTTON
+
     return wxFrameBase::HandleCommand(id, cmd, control);;
 }