How to turn the monitor off/on via code? 2

[imagenetics]

How can I turn the monitor off and on at application's runtime? I know about SendMessage(Application->Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 0); but it doesn't work (I use Windows XP but I'm not sure if it has something to do with it).

 

[itsgsd]

'0' is an invalid monitor state, This should work:

  #define MonitorOn -1
  #define MonitorOff 2
  #define MonitorStandby 1

  SendMessage(Application->Handle, WM_SYSCOMMAND, SC_MONITORPOWER, MonitorOff);

 

[imagenetics]

Yup. This works. Thanks.