handle accel keys for owner drawn menu items (based on the patch 657105)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18389 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -367,6 +367,9 @@ public:
     bool HandleChar(WXWPARAM wParam, WXLPARAM lParam, bool isASCII = FALSE);
     bool HandleKeyDown(WXWPARAM wParam, WXLPARAM lParam);
     bool HandleKeyUp(WXWPARAM wParam, WXLPARAM lParam);
+#ifdef __WIN32__
+    int HandleMenuChar(int chAccel, WXLPARAM lParam);
+#endif
 
     bool HandleQueryDragIcon(WXHICON *hIcon);