关闭屏幕保护
bool active = false;
SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, false, &active, 0x0002); //阻止屏幕保护程序的运行 关闭待机状态
SetThreadExecutionState(0x00000001 | 0x00000002 | 0x80000000); //防止系统关闭显示器或进入待机状态 打开待机状态
SetThreadExecutionState(0x00000001 | 0x00000002 | 0x80000000); //防止系统关闭显示器或进入待机状态