代码 /// <summary> 概述：表示按下全局热键后发生的事件参数。 /// </summary> public class HotkeyEventArgs : EventArgs { private int _keysID; /// <summary> 概述：唯一的全局热键编号。 /// </summary> public int KeysID { get { return this ._keysID; } } private Keys _keys; /// <summary> 概述：注册的全局热键。 /// </summary> public Keys Keys { get { return this ._keys; } } /// <summary> 概述：初始化 System.Windows.Forms.Hotkey 类的新实例。 /// </summary> /// <param name="keysID"> 唯一的全局热键编号。 </param> /// <param name="keys"> 注册的全局热键。 </param> public HotkeyEventArgs( int keysID, Keys keys) { this ._keysID = keysID; this ._keys = keys; } } /// <summary> 概述：表示按下全局热键后发生的事件委托。 /// </summary> public delegate void HotkeyDownEventHandler( object sender, HotkeyEventArgs e); /// <summary> 概述：表示注册、注销全局热键的封装。 /// </summary> public class Hotkey : IMessageFilter { /// <summary> 概述：窗体句柄。 /// </summary> IntPtr _hWnd; Dictionary < Keys, int > _keyList = new Dictionary < Keys, int > ( 11 ); [DllImport( " user32.dll " )] static extern int RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk); [DllImport( " user32.dll " )] static extern int UnregisterHotKey(IntPtr hWnd, int id); [DllImport( " kernel32.dll " )] static extern int GlobalAddAtom(String lpString); [DllImport( " kernel32.dll " )] static extern int GlobalDeleteAtom( int nAtom); /// <summary> 概述：初始化 System.Windows.Forms.Hotkey 类的新实例。 /// </summary> /// <param name="hWnd"> 窗口句柄。 </param> public Hotkey(IntPtr hWnd) { this ._hWnd = hWnd; Application.AddMessageFilter( this ); } [Flags] private enum HotkeyModifiers { None = 0 , Alt = 1 , Control = 2 , Shift = 4 , Windows = 8 } /// <summary> 概述：注册一个全局热键。 /// </summary> /// <param name="keys"> 键。 </param> public int RegisterHotkey(Keys keys) { int hotkeyid = GlobalAddAtom(Guid.NewGuid().ToString()); this ._keyList.Add(keys, hotkeyid); HotkeyModifiers modifiers = HotkeyModifiers.None; if ((keys & Keys.Control) == Keys.Control) { modifiers |= HotkeyModifiers.Control; keys = keys & ~ Keys.Control; } if ((keys & Keys.Alt) == Keys.Alt) { modifiers |= HotkeyModifiers.Alt; keys = keys & ~ Keys.Alt; } if ((keys & Keys.Shift) == Keys.Shift) { modifiers |= HotkeyModifiers.Shift; keys = keys & ~ Keys.Shift; } if ((keys & Keys.LWin) == Keys.LWin) { modifiers |= HotkeyModifiers.Windows; keys = keys & ~ Keys.LWin; } RegisterHotKey(_hWnd, hotkeyid, ( int )modifiers, ( int )keys); return hotkeyid; } /// <summary> 概述：注销一个全局热键。 /// </summary> /// <param name="keys"> 键。 </param> public void UnregisterHotkeys(Keys key) { if ( this ._keyList.ContainsKey(key)) { int keyid = this ._keyList[key]; UnregisterHotKey(_hWnd, keyid); GlobalDeleteAtom(keyid); this ._keyList.Remove(key); } } /// <summary> 概述：注销所有的全局热键。 /// </summary> public void UnregisterHotkeys() { Application.RemoveMessageFilter( this ); foreach ( int key in this ._keyList.Keys) { UnregisterHotKey(_hWnd, key); GlobalDeleteAtom(key); } this ._keyList.Clear(); } /// <summary> 概述：在调度消息之前将其筛选出来 /// </summary> /// <param name="m"> 要调度的消息。无法修改此消息。 </param> public bool PreFilterMessage( ref Message m) { if (m.Msg == 0x312 ) /* WM_HOTKEY */ { int keyID = ( int )m.WParam; foreach (var item in this ._keyList) { if (item.Value == keyID) { this .OnHotkeyDown( new HotkeyEventArgs(keyID, item.Key)); break ; } } } return false ; } /// <summary> 概述：按下全局热键后发生。 /// </summary> public event HotkeyDownEventHandler HotkeyDown; /// <summary> 概述：引发 System.Windows.Forms.Hotkey.HotkeyDown 事件。 /// </summary> /// <param name="e"> 参数。 </param> protected virtual void OnHotkeyDown(HotkeyEventArgs e) { if ( this .HotkeyDown != null ) this .HotkeyDown( this , e); } }