public class Win32    {        [DllImport("User32.Dll")]        public static extern void SetWindowText(int h, String s);        /// <summary>        /// 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。.NET方法:Marshal.GetLastWin32Error()        /// </summary>        /// <param name="hWnd">要定义热键的窗口的句柄</param>        /// <param name="id">定义热键ID（不能与其它ID重复）  </param>        /// <param name="fsModifiers">标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效</param>        /// <param name="vk">定义热键的内容,WinForm中可以使用Keys枚举转换，        /// WPF中Key枚举是不正确的,应该使用System.Windows.Forms.Keys枚举，或者自定义正确的枚举或int常量</param>        /// <returns></returns>        [DllImport("user32.dll", SetLastError = true)]        public static extern bool RegisterHotKey(            IntPtr hWnd,            int id,            KeyModifiers fsModifiers,            int vk            );        /// <summary>        /// 取消注册热键        /// </summary>        /// <param name="hWnd">要取消热键的窗口的句柄</param>        /// <param name="id">要取消热键的ID</param>        /// <returns></returns>        [DllImport("user32.dll", SetLastError = true)]        public static extern bool UnregisterHotKey(            IntPtr hWnd,            int id            );        /// <summary>        /// 向全局原子表添加一个字符串，并返回这个字符串的唯一标识符,成功则返回值为新创建的原子ID,失败返回0        /// </summary>        /// <param name="lpString"></param>        /// <returns></returns>        [DllImport("kernel32", SetLastError = true)]        public static extern short GlobalAddAtom(string lpString);        [DllImport("kernel32", SetLastError = true)]        public static extern short GlobalDeleteAtom(short nAtom);        /// <summary>        /// 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）        /// </summary>        [Flags()]        public enum KeyModifiers        {            None = 0,            Alt = 1,            Ctrl = 2,            Shift = 4,            WindowsKey = 8        }        /// <summary>        /// 热键的对应的消息ID        /// </summary>        public const int WmHotkey = 0x312;    }

        /// <summary>        /// 注册快捷集合        /// </summary>        readonly Dictionary<string, short> hotKeyDic = new Dictionary<string, short>();        public MainWindow()        {            InitializeComponent();            this.Loaded += (sender, e) =>            {                var wpfHwnd = new WindowInteropHelper(this).Handle;                var hWndSource = HwndSource.FromHwnd(wpfHwnd);                //添加处理程序                if (hWndSource != null) hWndSource.AddHook(MainWindowProc);                hotKeyDic.Add("Alt-S", Win32.GlobalAddAtom("Alt-S"));                hotKeyDic.Add("Alt-D", Win32.GlobalAddAtom("Alt-D"));                Win32.RegisterHotKey(wpfHwnd, hotKeyDic["Alt-S"], Win32.KeyModifiers.Alt, (int)System.Windows.Forms.Keys.S);                Win32.RegisterHotKey(wpfHwnd, hotKeyDic["Alt-D"], Win32.KeyModifiers.Alt, (int)System.Windows.Forms.Keys.D);            };        }

        /// <summary>        /// 响应快捷键事件        /// </summary>        /// <param name="hwnd"></param>        /// <param name="msg"></param>        /// <param name="wParam"></param>        /// <param name="lParam"></param>        /// <param name="handled"></param>        /// <returns></returns>        private IntPtr MainWindowProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)        {            switch (msg)            {                case Win32.WmHotkey:                    {                        int sid = wParam.ToInt32();                        if (sid == hotKeyDic["Alt-S"])                        {                            MessageBox.Show("按下Alt+S");                        }                        else if (sid == hotKeyDic["Alt-D"])                        {                            MessageBox.Show("按下Alt+D");                        }                        handled = true;                        break;                    }            }            return IntPtr.Zero;        }