C#通过热键控制显示器开关的方法
本文实例讲述了C#通过热键控制显示器开关的方法。分享给大家供大家参考。
具体实现方法如下:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace OpenMonitor
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
HotKey.RegisterHotKey(this.Handle, 100, 0, Keys.F4);
HotKey.RegisterHotKey(this.Handle,101,0,Keys.F5);
}
class HotKey
{
// 如果函数执行成功,返回值不为0。
// 如果函数执行失败,返回值为0。要得到扩展错误信息,调用GetLastError。
[DllImport("user32.dll ", SetLastError = true)]
public static extern bool RegisterHotKey(
IntPtr hWnd, // 要定义热键的窗口的句柄
int id, // 定义热键ID(不能与其它ID重复)
KeyModifiers fsModifiers, // 标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
Keys vk // 定义热键的内容
);
[DllImport("user32.dll ", SetLastError = true)]
public static extern bool UnregisterHotKey(
IntPtr hWnd, // 要取消热键的窗口的句柄
int id // 要取消热键的ID
);
// 定义了辅助键的名称(将数字转变为字符以便于记忆,也可去除此枚举而直接使用数值)
[Flags()]
public enum KeyModifiers
{
None = 0,
Alt = 1,
Ctrl = 2,
Shift = 4,
WindowsKey = 8
}
}
protected override void WndProc(ref Message m)
{
const int WM_HOTKEY = 0x0312;
// 按快捷键
switch (m.Msg)
{
case WM_HOTKEY:
switch (m.WParam.ToInt32())
{
case 100:
MonitorHelper.TurnOn();
break;
case 101:
MonitorHelper.TurnOff();
break;
}
break;
}
base.WndProc(ref m);
}
class MonitorHelper
{
public static void TurnOn()
{
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, -1);
}
public static void TurnOff()
{
SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, 2);
}
[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;
}
}
}
希望本文所述对大家的C#程序设计有所帮助。