c# 在WebBrowser中用SendMessage模拟鼠标点击

　　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 BrowserMouseClick

　　{

　　public partial class Form1 : Form

　　{

　　[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]

　　static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

　　[DllImport("user32.dll", SetLastError = true)]

　　static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);

　　[DllImport("user32.dll", CharSet = CharSet.Auto)]

　　static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

　　public Form1()

　　{

　　InitializeComponent();

　　}

　　private void Form1_Load(object sender, EventArgs e)

　　{

　　webBrowser1.Navigate("http://www.devpub.com");

　　}

　　private void btnMouseClick_Click(object sender, EventArgs e)

　　{

　　int x = 100; // X coordinate of the click

　　int y = 80; // Y coordinate of the click

　　IntPtr handle = webBrowser1.Handle;

　　StringBuilder className = new StringBuilder(100);

　　while (className.ToString() != "Internet Explorer_Server") // The class control for the browser

　　{

　　handle = GetWindow(handle, 5); // Get a handle to the child window

　　GetClassName(handle, className, className.Capacity);

　　}

　　IntPtr lParam = (IntPtr)((y << 16) | x); // The coordinates

　　IntPtr wParam = IntPtr.Zero; // Additional parameters for the click (e.g. Ctrl)

　　const uint downCode = 0x201; // Left click down code

　　const uint upCode = 0x202; // Left click up code

　　SendMessage(handle, downCode, wParam, lParam); // Mouse button down

　　SendMessage(handle, upCode, wParam, lParam); // Mouse button up

　　}

　　}

　　}