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C#注册系统热键类,参考多篇文章封装而成,只需一个构造函数即可完成,尤其适合于WPF

参考文章:http://www.cnblogs.com/dabaopku/archive/2010/02/21/1670793.html

源码下载

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Interop;
using System.Collections;

namespace ThunderStarter
{
/// <summary>
/// 直接构造类实例即可注册
/// 自动完成注销
/// 注意注册时会抛出异常
/// </summary>
    class HotKey
//注册系统热键类
//热键会随着程序结束自动解除,不会写入注册表
    {
#region Member

int KeyId ;         //热键编号
        IntPtr Handle ;     //窗体句柄
        Window window ;     //热键所在窗体
        uint Controlkey ;   //热键控制键
        uint Key ;          //热键主键

public delegate void OnHotkeyEventHandeler();     //热键事件委托
        public event OnHotkeyEventHandeler OnHotKey=null;   //热键事件    

static Hashtable KeyPair = new Hashtable();         //热键哈希表

private const int WM_HOTKEY = 0x0312;       // 热键消息编号

public enum KeyFlags    //控制键编码
        {
            MOD_ALT = 0x1,
            MOD_CONTROL = 0x2,
            MOD_SHIFT = 0x4,
            MOD_WIN = 0x8
        }        

#endregion

/// <summary>
/// 构造函数
/// </summary>
/// <param name="win">注册窗体</param>
/// <param name="control">控制键</param>
/// <param name="key">主键</param>
        public HotKey(Window win, HotKey.KeyFlags control, Keys key)
//构造函数,注册热键
        {
            Handle = new WindowInteropHelper(win).Handle;
            window=win;
            Controlkey = (uint)control;
            Key = (uint)key;
            KeyId=(int)Controlkey+(int)Key*10;
if (HotKey.KeyPair.ContainsKey(KeyId))
            {
throw new Exception("热键已经被注册!");
            }

//注册热键
            if(false == HotKey.RegisterHotKey(Handle, KeyId, Controlkey, Key))
            {
throw new Exception("热键注册失败!");
            }
if(HotKey.KeyPair.Count==0){
//消息挂钩只能连接一次!!
                if(false == InstallHotKeyHook(this))
                {
throw new Exception("消息挂钩连接失败!");
                }
            }

//添加这个热键索引
            HotKey.KeyPair.Add(KeyId, this);

        }

#region core

        [System.Runtime.InteropServices.DllImport("user32")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint controlKey, uint virtualKey);

        [System.Runtime.InteropServices.DllImport("user32")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);

static private bool InstallHotKeyHook(HotKey hk)
//安装热键处理挂钩
        {
if (hk.window == null || hk.Handle==IntPtr.Zero)
return false;

//获得消息源
            System.Windows.Interop.HwndSource source = System.Windows.Interop.HwndSource.FromHwnd(hk.Handle);
if (source==null)  return false;

//挂接事件
            source.AddHook(HotKey.HotKeyHook);
return true;
        }

static private IntPtr HotKeyHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
//热键处理过程
        {
if (msg == WM_HOTKEY)
            {
                HotKey hk = (HotKey)HotKey.KeyPair[(int)wParam];
if (hk.OnHotKey != null)   hk.OnHotKey();                    
            }    
return IntPtr.Zero;
        }

~HotKey()
//析构函数,解除热键
        {
           HotKey.UnregisterHotKey(Handle, KeyId);
        }

#endregion
    }
}