[C#] 모니터 ON/OFF 제어

using System.Runtime.InteropServices;
 
const int WM_SYSCOMMAND = 0x0112;
const int SC_MONITORPOWER = 0xF170;
const int MONITOR_ON = -1;
const int MONITOR_OFF = 2;
const int MONITOR_STANBY = 1;
 
[DllImport("user32.dll")]
private static extern int SendMessage(int hWnd, int hMsg, int wParam, int lParam);
  
// Monitor On
SendMessage(this.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_ON);
 
// Monitor Off
SendMessage(this.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_OFF);