C# 熱鍵簡易封裝 (2)：HotkeyHelper 類別完整實作與 IDisposable 模式

HotkeyHelper 核心程式碼

using System;
using System.Collections.Generic;
namespace GFSucker.Game.Provider
{
    public class HotkeyHelper : IDisposable
    {
        public const int MOD_ALT = 0x1;
        public const int MOD_CONTROL = 0x2;
        public const int MOD_SHIFT = 0x4;
        public const int MOD_WIN = 0x8;
        public const int WM_HOTKEY = 0x312;

        private Dictionary dicHotkeys = new Dictionary();

        public bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk)
        {
            if (dicHotkeys.ContainsKey(id))
            {
                if (dicHotkeys[id].IsRegistered)
                {
                    WinApi.UnregisterHotKey(dicHotkeys[id].HWnd, id);
                    dicHotkeys[id].IsRegistered = false;
                }
                dicHotkeys[id].HWnd = hWnd;
            }
            else
            {
                dicHotkeys.Add(id, new Hotkey(hWnd, false));
            }
            dicHotkeys[id].IsRegistered = WinApi.RegisterHotKey(hWnd, id, fsModifiers, vk);
            return dicHotkeys[id].IsRegistered;
        }

        private bool UnregisterHotKey(IntPtr hWnd, int id) => WinApi.UnregisterHotKey(hWnd, id);

        #region Hotkey 資訊內部類
        class Hotkey
        {
            public Hotkey(IntPtr hWnd, bool isRegistered) { _HWnd = hWnd; _IsRegistered = isRegistered; }
            private IntPtr _HWnd; public IntPtr HWnd { get => _HWnd; set => _HWnd = value; }
            private bool _IsRegistered; public bool IsRegistered { get => _IsRegistered; set => _IsRegistered = value; }
        }
        #endregion

        #region IDisposable
        public void Dispose()
        {
            foreach (int id in dicHotkeys.Keys)
                if (dicHotkeys[id].IsRegistered)
                    UnregisterHotKey(dicHotkeys[id].HWnd, id);
        }
        #endregion
    }
}

設計亮點

• 字典管理：Dictionary<int, Hotkey> 以 ID 索引，支援多組熱鍵。
• 自動重註冊：同 ID 再次註冊時自動先解除舊註冊。
• IDisposable：Dispose() 統一釋放所有已註冊熱鍵，配合 using 或表單關閉釋放。
• 修飾鍵常數：MOD_ALT/CONTROL/SHIFT/WIN 直接對應 WinAPI 定義。