Scheduled Task Shutdown monitor

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1

Hi all, I published via AD policy a scheduled task that turns off the monitor after user logoff, but this works “ONLY” if the scheduled task runs in my user context and “ONLY” on my machine. Has anyone had experiences like this? The script I’m using is the following:

# Source: http://www.powershellmagazine.com/2013/07/18/pstip-how-to-switch-off-display-with-powershell/

# Turn display off by calling WindowsAPI.
 
# PostMessage(HWND_BROADCAST,WM_SYSCOMMAND, SC_MONITORPOWER, POWER_OFF)
# HWND_BROADCAST  0xffff
# WM_SYSCOMMAND   0x0112
# SC_MONITORPOWER 0xf170
# POWER_OFF       0x0002
 
Add-Type -TypeDefinition '
using System;
using System.Runtime.InteropServices;
 
namespace Utilities {
   public static class Display
   {
      [DllImport("user32.dll", CharSet = CharSet.Auto)]
      private static extern IntPtr PostMessage(
         IntPtr hWnd,
         UInt32 Msg,
         IntPtr wParam,
         IntPtr lParam
      );
 
      public static void PowerOff ()
      {
         PostMessage(
            (IntPtr)0xffff, // HWND_BROADCAST
            0x0112,         // WM_SYSCOMMAND
            (IntPtr)0xf170, // SC_MONITORPOWER
            (IntPtr)0x0002  // POWER_OFF
         );
      }
   }
}
'

[Utilities.Display]::PowerOff()

quit

Thanx