C# - 控制螢幕 Monitor Control
參考：Complete guide on How to turn a monitor on/off/standby
以下程式碼，透過 button1 控制項 Click 事件執行 SendMessage() 方法，通知 Monitor 操作【ON】、【OFF】、【StandBy】等動作。
要是在有多螢幕的情形，應該是通通關閉吧？我沒有多各螢幕可以測試，所以不能夠確定。
程式碼：
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using System;
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using System.Runtime.InteropServices; // to import Dll
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using System.Windows.Forms;
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namespace MonitorControl
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{
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public partial class Form1 : Form
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{
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public enum MonitorState : int
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{
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MONITOR_ON = -1,
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MONITOR_OFF = 2,
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MONITOR_STANBY = 1
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} ;
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public Form1( )
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{
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InitializeComponent( );
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}
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public int WM_SYSCOMMAND = 0x0112;
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public int SC_MONITORPOWER = 0xF170;
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[DllImport( "user32.dll" ) ]
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private static extern int SendMessage( int hWnd, int hMsg, int wParam, int lParam);
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private void button1_Click( object sender, EventArgs e)
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{
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SendMessage( this.Handle.ToInt32 ( ), WM_SYSCOMMAND, SC_MONITORPOWER, ( int ) MonitorState.MONITOR_OFF );
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}
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}
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}
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