注册系统热键

已Ctrl+F1为例子
Hotkey.cs

 1using System;
 2using System.Runtime.InteropServices;
 3
 4namespace SystemHotKey
 5{
 6    public delegate void HotkeyEventHandler(int HotKeyID);
 7
 8    public class Hotkey : System.Windows.Forms.IMessageFilter
 9    {
10        System.Collections.Hashtable keyIDs = new System.Collections.Hashtable();
11        IntPtr hWnd;
12
13        public event HotkeyEventHandler OnHotkey;
14
15        public enum KeyFlags
16        {
17            MOD_ALT = 0x1,
18            MOD_CONTROL = 0x2,
19            MOD_SHIFT = 0x4,
20            MOD_WIN = 0x8
21        }
22        [DllImport("user32.dll")]
23        public static extern UInt32 RegisterHotKey( IntPtr hWnd, UInt32 id, UInt32 fsModifiers, UInt32 vk);
24
25        [DllImport("user32.dll")]
26        public static extern UInt32 UnregisterHotKey( IntPtr hWnd, UInt32 id); 
27
28        [DllImport("kernel32.dll")]
29        public static extern UInt32 GlobalAddAtom( String lpString );
30
31        [DllImport("kernel32.dll")]
32        public static extern UInt32 GlobalDeleteAtom( UInt32 nAtom );
33
34        public Hotkey(IntPtr hWnd)
35        {
36            this.hWnd = hWnd;
37            System.Windows.Forms.Application.AddMessageFilter(this);
38        }
39
40        public int RegisterHotkey(System.Windows.Forms.Keys Key, KeyFlags keyflags)
41        {
42            UInt32 hotkeyid = GlobalAddAtom(System.Guid.NewGuid().ToString());
43            RegisterHotKey( (IntPtr)hWnd, hotkeyid, (UInt32)keyflags, (UInt32)Key);
44            keyIDs.Add(hotkeyid, hotkeyid);
45            return (int)hotkeyid;
46        }
47
48        public void UnregisterHotkeys()
49        {
50            System.Windows.Forms.Application.RemoveMessageFilter(this);
51            foreach (UInt32 key in keyIDs.Values)
52            {
53                UnregisterHotKey(hWnd, key); 
54                GlobalDeleteAtom(key);
55            }
56        }
57
58        public bool PreFilterMessage(ref System.Windows.Forms.Message m) 
59        {
60            if (m.Msg == 0x312)
61            {
62                if(OnHotkey != null) 
63                {
64                    foreach (UInt32 key in keyIDs.Values)
65                    {
66                        if((UInt32)m.WParam == key)
67                        {
68                            OnHotkey((int)m.WParam);
69                            return true;
70                        }
71                    }
72                }
73            }
74            return false;
75        }
76    }
77}

FrmHotKeys.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using SystemHotKey;

namespace HotkeySample
{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class frmHotkey : System.Windows.Forms.Form
    {
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        private int HotkeyDemo;

        public frmHotkey()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //

            Hotkey h = new Hotkey(this.Handle);
            HotkeyDemo = h.RegisterHotkey(Keys.F1, Hotkey.KeyFlags.MOD_CONTROL);    //定义快捷键Ctrl+F1
            h .OnHotkey += new HotkeyEventHandler(h_OnHotkey);
            
        }

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            // 
            // frmHotkey
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(292, 270);
            this.Name = "frmHotkey";
            this.Text = "注册系统热键示例";

        }
        #endregion

        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new frmHotkey());
        }

        private void h_OnHotkey(int HotKeyID)
        {
            if (HotKeyID == HotkeyDemo)
            {
                MessageBox.Show("按了ctrl+f1");
                return;
            }
        }
    }
}