HKCard/HKHelper/TelevisionStart.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace HKHelper
{

    public class TelevisionStart
    {
        public static bool TurnOn()
        {
            return SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, -1) != 0;
        }

        public static bool TurnOff()
        {
            return SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2) != 0;
        }

        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);

        private static readonly IntPtr HWND_BROADCAST = new IntPtr(0xffff);
        private const uint WM_SYSCOMMAND = 0x0112;
        private const int SC_MONITORPOWER = 0xf170;
    }

}