VC++模拟关闭显示器（显示器待机）省电模式，双击生成的EXE文件，显示器即黑屏，按ESC键可恢复正常状态。-VC++ analog Close the display (display standby) power saving mode, double-click the generated EXE file, display a black screen, press the ESC key to return to normal state.