C#注册系统全局快捷键

int keyid = 10;

        Dictionary<int, HotKeyCallBackHanlder> keymap = new Dictionary<int, HotKeyCallBackHanlder>();

        public delegate void HotKeyCallBackHanlder();

        public enum HotkeyModifiers

        {

            Alt = 1,

            Control = 2,

            Shift = 4,

            Win = 8

        }

        [System.Runtime.InteropServices.DllImport("user32.dll")]

        static extern bool RegisterHotKey(IntPtr hWnd, int id, int modifiers, System.Windows.Forms.Keys vk);

        [System.Runtime.InteropServices.DllImport("user32.dll")]

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

        /// <summary>

        /// 注册快捷键

        /// </summary>

        /// <param name="hWnd">持有快捷键窗口的句柄</param>

        /// <param name="modifiers">组合键</param>

        /// <param name="vk">快捷键的虚拟键码</param>

        /// <param name="callBack">回调函数（按下快捷键时被调用的方法）</param>

        public void Regist(IntPtr hWnd, int modifiers, System.Windows.Forms.Keys vk, HotKeyCallBackHanlder callBack)

        {

            int id = keyid++;

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

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

            keymap[id] = callBack;

        }

        /// <summary>

        /// 注销快捷键

        /// </summary>

        /// <param name="hWnd">持有快捷键窗口的句柄</param>

        /// <param name="callBack">回调函数</param>

        public void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)

        {

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

            {

                if (var.Value == callBack)

                    UnregisterHotKey(hWnd, var.Key);

            }

        }

        /// <summary>

        /// 快捷键消息处理

        /// </summary>

        public void ProcessHotKey(System.Windows.Forms.Message m)

        {

            if (m.Msg == 0x312)

            {

                int id = m.WParam.ToInt32();

                HotKeyCallBackHanlder callback;

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

                    callback();

            }

        }

 1   HotKeys hotKsys = new HotKeys();

 2 

 3         private void Form1_Load(object sender, EventArgs e)

 4         {

 5             hotKsys.Regist(this.Handle, (int)HotKeys.HotkeyModifiers.Control + (int)HotKeys.HotkeyModifiers.Alt, Keys.H, CallBack_Hide);//Ctrl+Alt+H

 6             hotKsys.Regist(this.Handle, (int)HotKeys.HotkeyModifiers.Control, Keys.W, CallBack_Show);//Ctrl+W

 7         }

 8 

 9         void CallBack_Hide()

10         {

11             this.Hide();

12         }

13 

14         void CallBack_Show()

15         {

16             this.Show();

17         }

18 

19         protected override void WndProc(ref Message m)

20         {

21             hotKsys.ProcessHotKey(m);

22             base.WndProc(ref m);

23         }

24 

25         private void Form1_FormClosing(object sender, FormClosingEventArgs e)

26         {

27             hotKsys.UnRegist(this.Handle, CallBack_Hide);

28             hotKsys.UnRegist(this.Handle, CallBack_Show);

29         }