c#中通过设置钩子监视鼠标移动

这个问题来自论坛提问，C#的大致代码如下

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,EventArgse)
... {
Win32Hookhook = new Win32Hook();
hook.onMouseChange += new EventHandler(hook_onMouseChange);
hook.SetHook();
}

void hook_onMouseChange( object sender,EventArgse)
... {
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(
HookTypeidHook,
HOOKPROClpfn,
int hmod,
int dwThreadId);

public enum HookType
... {
WH_GETMESSAGE = 3
}

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

public event System.EventHandleronMouseChange;

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 ;
}
}
}