SendMessage/SC_MONITORPOWER won't turn monitor ON when running Windows 8

Question

I turn my monitors on and off by using the following code:

[DllImport(\"user32.dll\")]
static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam,          


        

Answer 1

I have found out this trick to work on windows 8.1

Turn them off

SendMessage(f.Handle, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)MonitorShutoff);

Turn them on

SendMessage(f.Handle, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)1);

According to MSN, "1" is to switch monitor to "Low Power" but it does the trick. The screen will not turn off anymore.