--- a/ui/win32/container.c	Sun Oct 19 21:20:08 2025 +0200
+++ b/ui/win32/container.c	Mon Nov 10 21:52:51 2025 +0100
@@ -139,6 +139,7 @@
             NULL,
             hInstance,
             NULL);
+    SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)ui_default_eventproc);
 
     W32Widget *widget = w32_widget_new(&grid_layout_widget_class, hwnd);
     ui_container_add(container, widget, &layout);