extern wxWindowList wxModelessWindows; // from dialog.cpp
extern wxMenu *wxCurrentPopupMenu;
-extern wxChar wxMDIFrameClassName[];
-extern wxChar wxMDIChildFrameClassName[];
+extern wxChar *wxMDIFrameClassName;
+extern wxChar *wxMDIChildFrameClassName;
extern wxWindow *wxWndHook; // from window.cpp
extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);