using System . Runtime . InteropServices;
[ DllImport ( "User32.DLL" )]
public static extern int SendMessage( IntPtr hWnd,
uint Msg, int wParam, int lParam);
public const int WM_SYSCOMMAND = 0x0112 ;
public const int SC_MONITORPOWER = 61808 ;
private void button1_Click( object sender , EventArgs e)
{
SendMessage(Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 1 );
}
private void button2_Click( object sender , EventArgs e)
{
SendMessage(Handle, WM_SYSCOMMAND, SC_MONITORPOWER, 0 );
}