在c#中使用Hook
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http://support.microsoft.com/default.aspx?scid=kb;en-us;318804
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace ThreadSpecificMouseHook
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
#region 定义hook函数
public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
//Declare the hook handle as an int.
static int hHook = 0;
//Declare the mouse hook constant.
//For other hook types, you can obtain these values from Winuser.h in the Microsoft SDK.
public const int WH_MOUSE = 7;
//Declare MouseHookProcedure as a HookProc type.
HookProc MouseHookProcedure;
//Declare the wrapper managed POINT class.
[StructLayout(LayoutKind.Sequential)]
public class POINT
{
public int x;
public int y;
}
//Declare the wrapper managed MouseHookStruct class.
[StructLayout(LayoutKind.Sequential)]
public class MouseHookStruct
{
public POINT pt;
public int hwnd;
public int wHitTestCode;
public int dwExtraInfo;
}
//This is the Import for the SetWindowsHookEx function.
//Use this function to install a thread-specific hook.
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn,
IntPtr hInstance, int threadId);
//This is the Import for the UnhookWindowsHookEx function.
//Call this function to uninstall the hook.
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);
//This is the Import for the CallNextHookEx function.
//Use this function to pass the hook information to the next hook procedure in chain.
[DllImport("user32.dll", CharSet = CharSet.Auto,
CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode,
IntPtr wParam, IntPtr lParam);
#endregion
private void button1_Click(object sender, EventArgs e)
{
if (hHook == 0)
{
// Create an instance of HookProc.
MouseHookProcedure = new HookProc(Form1.MouseHookProc);
hHook = SetWindowsHookEx(WH_MOUSE,
MouseHookProcedure,
(IntPtr)0,
AppDomain.GetCurrentThreadId());
//If the SetWindowsHookEx function fails.
if (hHook == 0)
{
MessageBox.Show("SetWindowsHookEx Failed");
return;
}
button1.Text = "UnHook Windows Hook";
}
else
{
bool ret = UnhookWindowsHookEx(hHook);
//If the UnhookWindowsHookEx function fails.
if (ret == false)
{
MessageBox.Show("UnhookWindowsHookEx Failed");
return;
}
hHook = 0;
button1.Text = "Set Windows Hook";
this.Text = "Mouse Hook";
}
}
/// <summary>
/// 处理鼠标事件的方法
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
public static int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
//Marshall the data from the callback.
MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
if (nCode < 0)
{
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
else
{
//Create a string variable that shows the current mouse coordinates.
String strCaption = "x = " +
MyMouseHookStruct.pt.x.ToString("d") +
" y = " +
MyMouseHookStruct.pt.y.ToString("d");
//You must get the active form because it is a static function.
Form tempForm = Form.ActiveForm;
//Set the caption of the form.
tempForm.Text = strCaption;
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
}
}
}
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