C# 关闭显示器（显示）

1、先引入DllImport所在的名称空间

using System.Runtime.InteropServices;

2、引入方法

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

private const uint WM_SYSCOMMAND = 0x0112;

private const uint SC_MONITORPOWER = 0xF170;

3、

//关闭显示器
SendMessage(this.Handle,WM_SYSCOMMAND,SC_MONITORPOWER,);

//打开显示器
SendMessage(this.Handle,WM_SYSCOMMAND,SC_MONITORPOWER, -);