--- a/ui/wpf/toolkit.h	Sat Feb 14 13:26:00 2015 +0100
+++ b/ui/wpf/toolkit.h	Sun Feb 15 15:44:24 2015 +0100
@@ -48,6 +48,8 @@
     int         value;
 } UiEventData;
 
+typedef void(*UIcallback)(void*,void*);
+
 UI_IMPORT void __stdcall UIinit(char *appname);
 UI_IMPORT void __stdcall UImain();
 UI_IMPORT void __stdcall UIshow(UIWIDGET widget);