using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Net;
using System.Drawing.Drawing2D;
namespace App
{
 public partial class Form2 : Form
 {
  public Form2()
  {
   InitializeComponent();
   //程序加载加载热键
   this.Load += delegate
   {
    // 热键一:Control +光标左箭头
    CustomSystemKeyBoard.RegisterHotKey(Handle, 100, 8, Keys.Left);
    // 热键一:Control +光标右箭头
    CustomSystemKeyBoard.RegisterHotKey(Handle, 200, 2, Keys.Right);
    // 热键一:Control +光标上箭头
    CustomSystemKeyBoard.RegisterHotKey(Handle, 300, 2, Keys.Up);
    // 热键一:Control +光标下箭头
    CustomSystemKeyBoard.RegisterHotKey(Handle, 400, 2, Keys.Down);
   };
   //在程序退出时取消热键的注册
   this.FormClosing += delegate
   {
    CustomSystemKeyBoard.UnregisterHotKey(Handle, 100);
    CustomSystemKeyBoard.UnregisterHotKey(Handle, 200);
    CustomSystemKeyBoard.UnregisterHotKey(Handle, 300);
    CustomSystemKeyBoard.UnregisterHotKey(Handle, 400);
   };
  }
  protected override void WndProc(ref Message m)
  {
   //如果m.Msg的值为0x0312那么表示用户按下了热键
   const int WM_HOTKEY = 0x0312;
   switch (m.Msg)
   {
    case WM_HOTKEY:
     ProcessKey(m);
     break;
   }
   base.WndProc(ref m);
  }
  /// <summary>
  /// 按下热键的操作
  /// </summary>
  /// <param name="m"></param>
  protected void ProcessKey(Message m)
  {
   //IntPtr用于表示指针或句柄的平台特定类型 
   string id = m.WParam.ToString();
   MessageBox.Show(id);
   switch (id)
   {
    case "100":
     //
     break;
    case "200":
     break;
    case "300":
     break;
    case "400":
     break;
   }
  }
 }
 public class CustomSystemKeyBoard
 {
  /// <summary>
  /// 声明API函数
  /// </summary>
  /// <param name="hWnd">Handle</param>
  /// <param name="id">热键id</param>
  /// <param name="fsModifiers">热键类型(KeyModifiers)</param>
  /// <param name="vk">键盘按键</param>
  /// <returns></returns>
  [System.Runtime.InteropServices.DllImport("user32.dll")]
  public static extern bool RegisterHotKey(
   IntPtr hWnd,
   int id,
   uint fsModifiers,
   Keys vk
   );
  /// <summary>
  /// 声明API函数
  /// </summary>
  /// <param name="hWnd"></param>
  /// <param name="id"></param>
  /// <returns></returns>
  [System.Runtime.InteropServices.DllImport("user32.dll")]
  public static extern bool UnregisterHotKey(IntPtr hWnd, int id);
  /// <summary>
  /// 定义一个KeyModifiers的枚举,以便出现组合键
  /// </summary>
  public enum KeyModifiers
  {
   None = 0,
   Alt = 1,
   Control = 2,
   Shift = 3,
   Windows = 8
  }
 }
}