Nikolay Sivov (@nsivov) commented about include/commctrl.h:
WINCOMMCTRLAPI HRESULT WINAPI LoadIconWithScaleDown(HINSTANCE, const WCHAR *, int, int, HICON *); WINCOMMCTRLAPI HRESULT WINAPI LoadIconMetric(HINSTANCE, const WCHAR *, int, HICON *);
+#ifndef COMCTL32_VERSION #define COMCTL32_VERSION 5 /* dll version */ +#endif
As I mentioned before, this should be set to 6 once we are not using it anymore.