// Format a message on the standard error (UNIX) or the debugging
// stream (Windows)
-WXDLLEXPORT void wxDebugMsg(const wxChar *fmt ...);
+WXDLLEXPORT void wxDebugMsg(const wxChar *fmt ...) ATTRIBUTE_PRINTF_1;
// Non-fatal error (continues)
WXDLLEXPORT_DATA(extern const wxChar*) wxInternalErrorStr;