HotKeys.cs

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace MouseSwitcher
{
	public class HotKeys
	{
		public delegate void HotKeyCallBackHanlder();

		public static string GetKeyName(HotkeyModifiers key)
        {
            return key switch
            {
                HotkeyModifiers.Alt => "Alt",
                HotkeyModifiers.Control => "Ctrl",
                HotkeyModifiers.Shift => "Shift",
                HotkeyModifiers.Win => "Win",
                _ => "UNKNOWN_" + ((int)key).ToString(),
            };
        }

        public static string GetKeyName(Keys key)
		{
			return Enum.GetName(typeof(Keys), key);
        }

        public enum HotkeyModifiers
		{
			Alt = 1,
			Control = 2,
			Shift = 4,
			Win = 8
		}

		public int keyid = 10;

		private Dictionary<int, HotKeyCallBackHanlder> keymap = new Dictionary<int, HotKeyCallBackHanlder>();

		[DllImport("user32.dll")]
		private static extern bool RegisterHotKey(IntPtr hWnd, int id, int modifiers, Keys vk);

		[DllImport("user32.dll")]
		private static extern bool UnregisterHotKey(IntPtr hWnd, int id);

		public void Regist(IntPtr hWnd, HotkeyModifiers modifiers, Keys vk, HotKeyCallBackHanlder callBack)
		{
			int num = keyid++;
			if (!RegisterHotKey(hWnd, num, (int)modifiers, vk))
			{
				throw new Exception("注册失败！");
			}
			keymap[num] = callBack;
		}

		public void UnRegist(IntPtr hWnd, HotKeyCallBackHanlder callBack)
		{
			foreach (KeyValuePair<int, HotKeyCallBackHanlder> item in keymap)
			{
				if (item.Value == callBack)
				{
					UnregisterHotKey(hWnd, item.Key);
					break;
				}
			}
		}

		public void ProcessHotKey(Message m)
		{
			if (m.Msg == 786)
			{
				int key = m.WParam.ToInt32();
				if (keymap.TryGetValue(key, out var value))
				{
					value();
				}
			}
		}
    }
}