显示器开关控制-优快云博客

本文链接：https://blog.youkuaiyun.com/huangruijie/article/details/1555054

本文介绍了一个用于控制显示器开关状态的C#类，通过调用Windows API函数实现显示器的开启与关闭功能。

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控制显示器的类

/// <summary>
    /// this class is used to control display
    /// </summary>
    class MonitorControl
    {
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
        //internal const int WM_SYSCOMMAND = 0x112;
        //internal const int SC_MONITORPOWER = 0xf170;

         const int MONITOR_ON = -0x1;
         const int MONITOR_LOWPOWER = 0x1;
         const int MONITOR_OFF = 2;
         const int SC_MONITORPOWER = 0xF170;
         const int WM_SYSCOMMAND = 0x112;

        /// <summary>
        /// turn on monitor
        /// </summary>
        public static void TurnOn(IntPtr Handle)
        {
            //打开显示器
            SendMessage(Handle, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_ON);

        }
        /// <summary>
        /// turn off monitor
        /// </summary>
        public static void TurnOff(IntPtr Handle)
        {
            //关闭显示器
            SendMessage(Handle, WM_SYSCOMMAND, SC_MONITORPOWER, MONITOR_OFF);
        }
    }