c#中通过设置钩子监视鼠标移动

 using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsApplication1
...{
    public partial class Form1 : Form
    ...{
        public Form1()
        ...{
            InitializeComponent();
        }
         
        private void Form1_Load(object sender, EventArgs e)
        ...{
            Win32Hook hook = new Win32Hook();
            hook.onMouseChange += new EventHandler(hook_onMouseChange);
            hook.SetHook();
        }

        void hook_onMouseChange(object sender, EventArgs e)
        ...{
            this.Text = Cursor.Position.ToString();
        }
    }
    public class Win32Hook
    ...{

        [DllImport("kernel32")]
        public static extern int GetCurrentThreadId();

        [DllImport("user32",CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetWindowsHookEx(
            HookType idHook,
            HOOKPROC lpfn,
            int hmod,
            int dwThreadId);

        public enum HookType
        ...{
            WH_GETMESSAGE = 3
        }

        public delegate int HOOKPROC(int nCode, int wParam, int lParam);

        public event System.EventHandler onMouseChange;

        public void SetHook()
        ...{
            SetWindowsHookEx(HookType.WH_GETMESSAGE,
                new HOOKPROC(this.MyKeyboardProc),
                0,
                GetCurrentThreadId());
        }

        public int MyKeyboardProc(int nCode, int wParam, int lParam)
        ...{
            if (onMouseChange != null)
            ...{
                onMouseChange(null, null);
            }
            return 0;
        }
    }
}