C# 禁用全局快捷键

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原文作者：唐宋元明清

原文地址：https://www.cnblogs.com/kybs0/p/12558056.html

C# 禁用全局快捷键
给软件添加快捷键时，经常遇到其它软件或者系统已设置的快捷键，导致功能冲突。

HotKey函数

下面介绍一个user32.dll的RegisterHotKey以及UnregisterHotKey热键处理的函数;
- 注册热键 RegisterHotKey function ^[1];

BOOL RegisterHotKey(HWND hWnd, //响应热键的窗口句柄，如果为空，则注册到调用线程上Int id, //热键的唯一标识UINT fsModifiers, //热键的辅助按键UINT vk //热键的键值
);

解除注册热键UnregisterHotKey function ^[2];

BOOL WINAPI UnregisterHotKey( HWND hWnd,//热键注册的窗口 int  id//要解除注册的热键ID
);

添加热键注册和注销函数

Register方法 - 注册user32.dll函数RegisterHotKey以禁用全局键，并在缓存内添加禁用记录;

ProcessHotKey方法 - 外界全局键调用时，调用回调函数;

public class HotKeys{#region 注册快捷键/// <summary>/// 注册快捷键/// </summary>/// <param name="modifiers"></param>/// <param name="key"></param>public void Register(int modifiers, Keys key){Register(IntPtr.Zero, modifiers, key);}/// <summary>/// 注册快捷键/// </summary>/// <param name="hWnd"></param>/// <param name="modifiers"></param>/// <param name="key"></param>/// <param name="callBack"></param>public void Register(IntPtr hWnd, int modifiers, Keys key, HotKeyCallBackHanlder callBack = null){var registerRecord = _hotkeyRegisterRecords.FirstOrDefault(i => i.IntPtr == hWnd && i.Modifiers == modifiers && i.Key == key);if (registerRecord != null){UnregisterHotKey(hWnd, registerRecord.Id);_hotkeyRegisterRecords.Remove(registerRecord);}int id = registerId++;if (!RegisterHotKey(hWnd, id, modifiers, key))throw new Exception("注册失败！");_hotkeyRegisterRecords.Add(new HotkeyRegisterRecord(){Id = id,IntPtr = hWnd,Modifiers = modifiers,Key = key,CallBack = callBack});}#endregion#region 注销快捷键/// <summary>/// 注销快捷键/// </summary>/// <param name="hWnd"></param>/// <param name="modifiers"></param>/// <param name="key"></param>public void UnRegister(IntPtr hWnd, int modifiers, Keys key){var registerRecord = _hotkeyRegisterRecords.FirstOrDefault(i => i.IntPtr == hWnd && i.Modifiers == modifiers && i.Key == key);if (registerRecord != null){UnregisterHotKey(hWnd, registerRecord.Id);_hotkeyRegisterRecords.Remove(registerRecord);}}/// <summary>/// 注销快捷键/// </summary>/// <param name="modifiers"></param>/// <param name="key"></param>public void UnRegister(int modifiers, Keys key){var registerRecord = _hotkeyRegisterRecords.FirstOrDefault(i => i.IntPtr == IntPtr.Zero && i.Modifiers == modifiers && i.Key == key);if (registerRecord != null){UnregisterHotKey(IntPtr.Zero, registerRecord.Id);_hotkeyRegisterRecords.Remove(registerRecord);}}/// <summary>/// 注销快捷键/// </summary>/// <param name="hWnd"></param>public void UnRegister(IntPtr hWnd){var registerRecords = _hotkeyRegisterRecords.Where(i => i.IntPtr == hWnd);//注销所有foreach (var registerRecord in registerRecords){UnregisterHotKey(hWnd, registerRecord.Id);_hotkeyRegisterRecords.Remove(registerRecord);}}#endregion#region 快捷键消息处理// 快捷键消息处理public void ProcessHotKey(Message message){ProcessHotKey(message.Msg, message.WParam);}/// <summary>/// 快捷键消息处理/// </summary>/// <param name="msg"></param>/// <param name="wParam">消息Id</param>public void ProcessHotKey(int msg, IntPtr wParam){if (msg == 0x312){int id = wParam.ToInt32();var registerRecord = _hotkeyRegisterRecords.FirstOrDefault(i => i.Id == id);registerRecord?.CallBack?.Invoke();}}#endregion#region MyRegion//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);//标识-区分不同的快捷键int registerId = 10;//添加key值注册字典，后续调用时有回调处理函数private readonly List<HotkeyRegisterRecord> _hotkeyRegisterRecords = new List<HotkeyRegisterRecord>();public delegate void HotKeyCallBackHanlder();#endregion}public class HotkeyRegisterRecord{public IntPtr IntPtr { get; set; }public int Modifiers { get; set; }public Keys Key { get; set; }public int Id { get; set; }public HotKeys.HotKeyCallBackHanlder CallBack { get; set; }}//组合控制键public enum HotkeyModifiers{Alt = 1,Control = 2,Shift = 4,Win = 8}

在上方的HotKeys类中，注册方法Register提供了一个回调函数，后续监听到外界全局键时，可以通知回调函数处理。
参数WParam，是窗口响应时快捷键值，在winform和WPF窗口消息函数中都是有的。
另，组合快捷键内部枚举类HotkeyModifiers，枚举值来自官网文档WM_HOTKEY message;

无感知禁用全局快捷键

比如：

禁用Ctrl+Alt+1、Ctrl+Alt+2、Ctrl+Alt+3、Ctrl+Alt+4（Windows桌面图标大小的调节快捷键）;

HotKeys hotKeys = new HotKeys();hotKeys.Register((int)HotkeyModifiers.Control, Keys.N);hotKeys.Register((int)HotkeyModifiers.Control + (int)HotkeyModifiers.Alt, Keys.D1);hotKeys.Register((int)HotkeyModifiers.Control + (int)HotkeyModifiers.Alt, Keys.D2);hotKeys.Register((int)HotkeyModifiers.Control + (int)HotkeyModifiers.Alt, Keys.D3);hotKeys.Register((int)HotkeyModifiers.Control + (int)HotkeyModifiers.Alt, Keys.D4);

注：

窗口句柄参数，如果提供空的话，则注册到调用线程上。
Keys类型在system.windows.Forms程序集下，如果是WPF的Key，可以使用KeyInterop将Wpf键值类型转换为Winform键值再调用此函数。

无感知禁用全局快捷键后回调

如果禁用全局快捷键的同时，外界触发快捷键时需要此程序回调处理，可以添加窗口消息处理：

1）新建一个类HotKeyHandleWindow，继承自Window;

窗口样式 - 高宽为0，窗口样式None;
添加热键注册的调用;
添加WndProc，处理窗口消息;

public class HotKeyHandleWindow : Window{private readonly HotKeys _hotKeys = new HotKeys();public HotKeyHandleWindow(){WindowStyle = WindowStyle.None;Width = 0;Height = 0;Loaded += (s, e) =>{//这里注册了Ctrl+Alt+1 快捷键_hotKeys.Register(new WindowInteropHelper(this).Handle,(int)HotkeyModifiers.Control + (int)HotkeyModifiers.Alt, Keys.D1, CallBack);};}protected override void OnSourceInitialized(EventArgs e){base.OnSourceInitialized(e);var hwndSource = PresentationSource.FromVisual(this) as HwndSource;hwndSource?.AddHook(new HwndSourceHook(WndProc));}public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled){//窗口消息处理函数_hotKeys.ProcessHotKey(msg, wParam);return hwnd;}//按下快捷键时被调用的方法public void CallBack(){}}

2）调用窗口类;

var hotKeyHandleWindow = new HotKeyHandleWindow();
hotKeyHandleWindow.Show();
hotKeyHandleWindow.Hide();

以上有回调响应，但是也是无感知的。

源码下载^[3]

参考资料

[1]

RegisterHotKey function : https://docs.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-registerhotkey?redirectedfrom=MSDN

[2]

UnregisterHotKey function : https://docs.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-unregisterhotkey

[3]

源码下载: https://github.com/Kybs0/DiableGlobalShortcuts

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