making wxMSW MSLU(unicows)-friendly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13043 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/private.h

@@ -391,6 +391,9 @@ WXDLLEXPORT extern wxString wxGetWindowClass(WXHWND hWnd);
 // is, for mainly historical reasons, signed)
 WXDLLEXPORT extern WXWORD wxGetWindowId(WXHWND hWnd);
 
+// check if hWnd's WNDPROC is wndProc. Return true if yes, false if they are different
+extern bool wxCheckWindowWndProc(WXHWND hWnd, WXFARPROC wndProc);
+
 // Does this window style specify any border?
 inline bool wxStyleHasBorder(long style)
 {