//引入系统API

        [DllImport("user32.dll")]

        static extern bool RegisterHotKey(IntPtr hWnd, int id, int modifiers, Keys vk);

        [DllImport("user32.dll")]

        static extern bool UnregisterHotKey(IntPtr hWnd, int id);

        int keyid = ;     //区分不同的快捷键

        Dictionary<int, HotKeyCallBackHanlder> keymap = new Dictionary<int, HotKeyCallBackHanlder>();   //每一个key对于一个处理函数

        public delegate void HotKeyCallBackHanlder();

        //组合控制键

        public enum HotkeyModifiers

        {

            Alt = ,

            Control = ,

            Shift = ,

            Win =

        }

        //注册快捷键

        public void Regist(IntPtr hWnd, int modifiers, Keys vk, HotKeyCallBackHanlder callBack)

        {

            int id = keyid++;

            if (!RegisterHotKey(hWnd, id, modifiers, vk))

                throw new Exception("注册失败！");

            keymap[id] = callBack;

        }

        // 注销快捷键

        public void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)

        {

            foreach (KeyValuePair<int, HotKeyCallBackHanlder> var in keymap)

            {

                if (var.Value == callBack)

                {

                    UnregisterHotKey(hWnd, var.Key);

                    return;

                }

            }

        }

        // 快捷键消息处理

        public void ProcessHotKey(Message m)

        {

            if (m.Msg == 0x312)

            {

                int id = m.WParam.ToInt32();

                HotKeyCallBackHanlder callback;

                if (keymap.TryGetValue(id, out callback))

                    callback();

            }

        }

public Form1()

        {

            InitializeComponent();

        }

        HotKeys h = new HotKeys();

        private void button1_Click(object sender, EventArgs e)

        {

            if (button1.Text == "注册")

            {

                string vaule = textBox1.Text;

                Regist(vaule);

                button1.Text = "卸载";

                label2.Text = "注册成功";

            }

            else

            {

                h.UnRegist(this.Handle, CallBack);

                button1.Text = "注册";

                label2.Text = "卸载成功";

            }

        }

        private void Regist(string str)

        {

            if (str == "")

                return;

            int modifiers = ;

            Keys vk = Keys.None;

            foreach (string value in str.Split('+'))

            {

                if (value.Trim() == "Ctrl")

                    modifiers = modifiers + (int)HotKeys.HotkeyModifiers.Control;

                else if (value.Trim() == "Alt")

                    modifiers = modifiers + (int)HotKeys.HotkeyModifiers.Alt;

                else if (value.Trim() == "Shift")

                    modifiers = modifiers + (int)HotKeys.HotkeyModifiers.Shift;

                else

                {

                    if (Regex.IsMatch(value, @"[0-9]"))

                    {

                        vk = (Keys)Enum.Parse(typeof(Keys), "D" + value.Trim());

                    }

                    else

                    {

                        vk = (Keys)Enum.Parse(typeof(Keys), value.Trim());

                    }

                }

            }

            //这里注册了Ctrl+Alt+E 快捷键

            h.Regist(this.Handle, modifiers, vk, CallBack);

        }

        //按下快捷键时被调用的方法

        public void CallBack()

        {

            label2.Text = "快捷键被调用！";

        }

        protected override void WndProc(ref Message m)

        {

            //窗口消息处理函数

            h.ProcessHotKey(m);

            base.WndProc(ref m);

        }

        private void textBox1_KeyDown(object sender, KeyEventArgs e)

        {

            StringBuilder keyValue = new StringBuilder();

            keyValue.Length = ;

            keyValue.Append("");

            if (e.Modifiers != )

            {

                if (e.Control)

                    keyValue.Append("Ctrl + ");

                if (e.Alt)

                    keyValue.Append("Alt + ");

                if (e.Shift)

                    keyValue.Append("Shift + ");

            }

            if ((e.KeyValue >=  && e.KeyValue <= ) ||

                (e.KeyValue >=  && e.KeyValue <= ) ||   //a-z/A-Z

                (e.KeyValue >=  && e.KeyValue <= ))   //F1-F12

            {

                keyValue.Append(e.KeyCode);

            }

            else if ((e.KeyValue >=  && e.KeyValue <= ))    //0-9

            {

                keyValue.Append(e.KeyCode.ToString().Substring());

            }

            ((TextBox)sender).Text = keyValue.ToString();

        }

        private void textBox1_KeyUp(object sender, KeyEventArgs e)

        {

            string str = ((TextBox)sender).Text.TrimEnd();

            int len = str.Length;

            if (len >=  && str.Substring(str.Length - ) == "+")

            {

                ((TextBox)sender).Text = "";

            }

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)

        {

            h.UnRegist(this.Handle, CallBack);

        }