C# register global hotkey ,onekey 注册多个全局热键以及

在C#中，可以使用Windows API函数来注册全局热键。以下是一个示例代码，演示如何注册多个全局热键：

using System; using System.Runtime.InteropServices; using System.Windows.Forms;  public class HotkeyManager {     private const int WM_HOTKEY = 0x0312;      [DllImport("user32.dll")]     private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, Keys vk);      [DllImport("user32.dll")]     private static extern bool UnregisterHotKey(IntPtr hWnd, int id);      private IntPtr handle;     private int currentId;      public HotkeyManager(IntPtr handle)     {         this.handle = handle;         currentId = 0;     }      public void RegisterHotkey(Keys key, KeyModifiers modifiers)     {         RegisterHotKey(handle, currentId, (int)modifiers, key);         currentId++;     }      public void UnregisterHotkeys()     {         for (int i = 0; i < currentId; i++)         {             UnregisterHotKey(handle, i);         }     }      public event Action<int> HotkeyPressed;      protected virtual void OnHotkeyPressed(int id)     {         HotkeyPressed?.Invoke(id);     }      public void ProcessHotkeyMessage(Message m)     {         if (m.Msg == WM_HOTKEY)         {             int id = m.WParam.ToInt32();             OnHotkeyPressed(id);         }     } }  public enum KeyModifiers {     None = 0,     Alt = 1,     Ctrl = 2,     Shift = 4,     Win = 8 }  // Example usage:  public class MainForm : Form {     private HotkeyManager hotkeyManager;      public MainForm()     {         hotkeyManager = new HotkeyManager(Handle);         hotkeyManager.HotkeyPressed += HotkeyManager_HotkeyPressed;         RegisterHotkeys();     }      private void RegisterHotkeys()     {         hotkeyManager.RegisterHotkey(Keys.A, KeyModifiers.None);         hotkeyManager.RegisterHotkey(Keys.B, KeyModifiers.None);         hotkeyManager.RegisterHotkey(Keys.C, KeyModifiers.None);     }      private void HotkeyManager_HotkeyPressed(int id)     {         Console.WriteLine("Hotkey pressed: " + id);     }      protected override void WndProc(ref Message m)     {         hotkeyManager.ProcessHotkeyMessage(m);         base.WndProc(ref m);     } }  // Create and run the main form Application.Run(new MainForm()); 

在上面的示例中，HotkeyManager类负责注册和注销全局热键，并处理热键事件。MainForm类继承自Form，并使用HotkeyManager来注册三个全局热键（A、B和C键）。在HotkeyManager_HotkeyPressed方法中，可以根据热键的ID执行相应的操作。

注意，在注册热键之前，需要先调用RegisterHotKey函数，传入窗口的句柄、热键ID、修改键和热键键值。当热键被按下时，系统将发送一个WM_HOTKEY消息到窗口的消息队列中，可通过重写WndProc方法来处理该消息。