روشن کردن
SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, - 1)
خاموش کردن
SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 0)
روشن کردن
SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, - 1)
خاموش کردن
SendMessage(Application.Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 0)