C# register global hotkey ,onekey 注冊多個全局熱鍵以及

在C#中，可以使用Windows API函數(shù)來注冊全局熱鍵。以下是一個示例代碼，演示如何注冊多個全局熱鍵：

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類負責(zé)注冊和注銷全局熱鍵，并處理熱鍵事件。MainForm類繼承自Form，并使用HotkeyManager來注冊三個全局熱鍵（A、B和C鍵）。在HotkeyManager_HotkeyPressed方法中，可以根據(jù)熱鍵的ID執(zhí)行相應(yīng)的操作。

注意，在注冊熱鍵之前，需要先調(diào)用RegisterHotKey函數(shù)，傳入窗口的句柄、熱鍵ID、修改鍵和熱鍵鍵值。當熱鍵被按下時，系統(tǒng)將發(fā)送一個WM_HOTKEY消息到窗口的消息隊列中，可通過重寫WndProc方法來處理該消息。