c# RegHotKey類，寫窗口程序，注冊全局熱鍵更方便。

c#在操作winApi時有很多不便。比如沒有指針就很讓人頭痛。

這兩天需要寫一個注冊全局熱鍵的程序，於是寫了這個類。注冊熱鍵更輕松了

調用非常簡單：

hk = new HotKey();
hk.RegHotKey(Keys.End,fun);//第2個參數是方法名稱

hk.UnRegHotKey(Keys.End);//注銷熱鍵

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

namespace xinjeHotkey
{
    
    public class HotKey:Form
    {

        private List keyIds = new List();
        private uint id = 0;

        [DllImport("user32.dll")]
        public static extern UInt32 RegisterHotKey(IntPtr hWnd, UInt32 id, UInt32 fsModifiers, UInt32 vk);
        
        [DllImport("user32.dll")]
        public static extern UInt32 UnregisterHotKey(IntPtr hWnd, UInt32 id); 

        public HotKey()
        {           
           
        }
        public delegate void myfun();
        public void RegHotKey(Keys key,myfun e)
        {
            id++;
            idAndFun fi = new idAndFun();
            fi.id = id;
            fi.key = (uint)key;
            fi.mf = (object)e;
            keyIds.Add(fi);
            RegisterHotKey(this.Handle, id, 0, (uint)key);
        }
        public void UnRegHotKey(Keys key)
        {
            uint temp = (uint)key;
            for (int i = 0; i < keyIds.Count; i++)
            {
                if (keyIds[i].key == temp)
                {
                    UnregisterHotKey(this.Handle, keyIds[i].id);
                    keyIds.RemoveAt(i);
                }
            }
        }
        protected override void WndProc(ref Message m)
        {
            const int WM_HOTKEY = 0x0312;
            if (m.Msg == WM_HOTKEY)
            {
                for (int i = 0; i < keyIds.Count; i++)
                {
                    if (m.WParam.ToInt32() == keyIds[i].id)
                    {
                        myfun mff = (myfun)keyIds[i].mf;
                        mff();
                    }
                }
            }
            base.WndProc(ref m);
        }

    }
    class idAndFun
    {
        public uint id;
        public uint key;
        public object mf;
    }
}