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.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;
using mshtml;namespace 获取类名Internet_Explorer_Server控件的内容
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){if(String.IsNullOrEmpty(tbHandle.Text)){MessageBox.Show("请写好窗口类名为:Internet Explorer_Server的窗口句柄");return;}mshtml.IHTMLDocument2 id = GetHtmlDocument(int.Parse(tbHandle.Text));textBox1.Text = id.body.innerHTML;}      class Win32API{[DllImport("user32", EntryPoint = "SendMessage")]public static extern int SendMessage(int hwnd, int wMsg, int wParam, ref int lParam);[DllImport("user32", EntryPoint = "RegisterWindowMessage")]public static extern int RegisterWindowMessage(string lpString);[DllImport("OLEACC.DLL", EntryPoint = "ObjectFromLresult")]public static extern int ObjectFromLresult(int lResult,ref System.Guid riid,int wParam,[MarshalAs(UnmanagedType.Interface), System.Runtime.InteropServices.In, System.Runtime.InteropServices.Out]ref System.Object ppvObject//注意这个函数ObjectFromLresult的声明);}public mshtml.IHTMLDocument2 GetHtmlDocument(int hwnd){System.Object domObject = new System.Object();int tempInt = 0;System.Guid guidIEDocument2 = new Guid();int WM_Html_GETOBJECT =Win32API.RegisterWindowMessage("WM_Html_GETOBJECT");//定义一个新的窗口消息int W = Win32API.SendMessage(hwnd, WM_Html_GETOBJECT, 0, ref tempInt);//注:第二个参数是RegisterWindowMessage函数的返回值int lreturn = Win32API.ObjectFromLresult(W, ref guidIEDocument2, 0, ref domObject);mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)domObject;return doc;}}
}