--- a/ui/ui/toolkit.h	Mon Jan 22 17:27:47 2024 +0100
+++ b/ui/ui/toolkit.h	Sat Jan 27 17:50:19 2024 +0100
@@ -69,6 +69,8 @@
 
 #elif UI_WINUI
 
+#include <Windows.h>
+
 #define UIEXPORT __declspec(dllexport) 
 
 #ifdef __cplusplus