diff -r 5e9bc6428bac -r 2cd3b4131a57 ui/common/wrapper.h
--- a/ui/common/wrapper.h	Tue May 19 18:31:16 2026 +0200
+++ b/ui/common/wrapper.h	Tue May 19 18:32:34 2026 +0200
@@ -39,6 +39,7 @@
 UIEXPORT UiContext* ui_object_get_context(UiObject *obj);
 UIEXPORT void* ui_object_get_windowdata(UiObject *obj);
 UIEXPORT void ui_object_set_windowdata(UiObject *obj, void *windowdata);
+UIEXPORT void ui_object_set_onclose(UiObject *obj, ui_callback callback, void *userdata);
 
 UIEXPORT void* ui_list_get_data(UiList *list);
 UIEXPORT void* ui_list_get_iter(UiList *list);