As usual while waiting for the next release - don't forget to check the nightly builds in the forum.
gcc.exe -o bin\Debug\GTK_Demo.exe obj\Debug\main.o -LC:/msys64/mingw64/bin/../lib -lgtk-3 -lgdk-3 -lz -lgdi32 -limm32 -lshell32 -lole32 -Wl,-luuid -lwinmm -ldwmapi -lsetupapi -lcfgmgr32 -lpangowin32-1.0 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../../mingw32/bin/ld.exe: cannot find -ldwmapicollect2.exe: error: ld returned 1 exit status
/* * dwmapi.h * * Some dwmapi.dll exported functions such as * DwmFlush * DwmAttachMilContent * DwmDetachMilContent * are not declared in this header for not being documented by Microsoft * */#ifndef __WINAPI_DWMAPI_H#define __WINAPI_DWMAPI_H#include <wtypes.h>/* for MARGINS structure declaration. */#include <uxtheme.h>/* * This API is available only on Vista+ versions. It's not guarded by version check * because that would cause problems with Mozilla code (and MSVC doesn't seem to be * doing that as well). */#ifdef __cplusplusextern "C" {#endif/* FIXME: move to winuser.h *//* DWM messages. */#define WM_DWMCOMPOSITIONCHANGED 0x031E#define WM_DWMNCRENDERINGCHANGED 0x031F#define WM_DWMCOLORIZATIONCOLORCHANGED 0x0320#define WM_DWMWINDOWMAXIMIZEDCHANGE 0x0321/* FIXME end */