开关显示器

]、。·ˉˇ¨〃々—～‖…’”〕〉》」』〗】∶！＂＇），．：；？］｀ Turn off the monitor

// turn it off:

SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 0);  

// turn it on again:

SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, -1);