qt下调用win32api 修改分辨率

在头文件中添加

#include <window.h>

DEVMODE DevMode;
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &DevMode);
DevMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
DevMode.dmPelsWidth = 800;
DevMode.dmPelsHeight = 600;
ChangeDisplaySettings(&DevMode, CDS_FULLSCREEN);