COM INTEROP AVEC INTERNET EXPLORER (SHDOCVW, MSHTML) EN C#

using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
//First add these references: SHDocVw.dll and mshtml.tlb
using mshtml;
using SHDocVw; // SHDocVw can be replaced by MeoSHDocVw
//MeoSHDocVw.dll is an interop dll for SHDocVW.dll with a strong name key in the file MeoSHDocVw.snk,
//created like this: 
//1) run  sn.exe -k MeoSHDocVw.snk 
//2) After that  run TlbImp.exe c:\windows\system32\ShdocVw.dll /keyfile:MeoSHDocVw.snk /out:MeoSHDocVw.dll 

namespace ClassLibrary1
{
    /// <summary>
    /// Autor: Didier Meo, ICT Consultant, developed for http://www.meo-x.net
    /// </summary>
    public class IExplorer
    {
        #region class variables & Constructor

        //private static SHDocVw.InternetExplorer _Explorer = null;
        private static SHDocVw.IWebBrowserApp _Webbrowser = null;
        private static mshtml.HTMLDocument _objDocument = null;
        private SHDocVw.ShellWindows _ShellWindows = null;
        private int _iIEnr = 0;
        private bool _blnSearchedExplorer = false;
        private string _strSearchedTitle = null;
        private string _strContent = null, _strContentAll = null, _strLocationURL = null, _strTitle = null;
        private int _iFrameNumber = 0;


        /// 
        /// Constructor for IExplorer
        /// 
        public IExplorer()
        {
            this._strSearchedTitle = "";
            this._Init();
        }

        #endregion


        #region Properties

        /// 
        /// Location URL 
        /// 
        public string HttpUrl
        {
            get
            {
                return _strLocationURL;
            }
            set
            {
                _strLocationURL = (string)value.ToString();
            }
        }


        /// 
        /// Searched Title 
        /// 
        public string SearchedTitle
        {
            set
            {
                _strSearchedTitle = (string)value.ToString();
            }
        }

        /// 
        /// Content for a Frame or for a page without Frames
        /// 
        public string Content
        {
            get
            {
                return this._strContent;
            }
        }

        /// 
        /// Content of an HTML page without Frames or Content for all Frames separated by STX 
        /// 
        public string ContentAll
        {
            get
            {
                return this._strContentAll;
            }
        }

        /// 
        /// Title of an HTML page
        /// 
        public string Title
        {
            get
            {
                return this._strTitle;
            }
        }

        /// 
        /// Number of frames for an HTML page
        /// 
        public int FrameNumber
        {
            get
            {
                return this._iFrameNumber;
            }
        }

        #endregion


        #region Methods

        /// 
        /// Initialization of Variables
        /// 
        [ComVisible(false)]
        private void _Init()
        {
            this._strContent = "";
            this._strContentAll = "";
            this._strLocationURL = "";
            this._strTitle = "";
            this._iFrameNumber = 0;
            this._iIEnr = 0;
        }


        /// 
        /// Gett Internet Explorer Data (URL, Title, Content) for a searched HTML page or for all its frames. 
        /// 
        public void GetIExplorerData()
        {
            this._Init();
            this._blnSearchedExplorer = false;
            _ShellWindows = new SHDocVw.ShellWindows();
            _iIEnr = _ShellWindows.Count;
            if (_iIEnr < 1)
            {
                this._blnSearchedExplorer = false;
                return;
            }
            _objDocument = new mshtml.HTMLDocument();
            for (int nI = 0; nI < _iIEnr; nI++)
            {
                object index = (object)nI;
                _strLocationURL = "";
                _strTitle = "";
                object oSWItem = _ShellWindows.Item(index);
                _Webbrowser = (IWebBrowserApp)oSWItem;
                try
                {
                    _objDocument = (mshtml.HTMLDocument)_Webbrowser.Document;
                    _strLocationURL = _Webbrowser.LocationURL;
                    _strTitle = _objDocument.title;
                    if (_strTitle.IndexOf(this._strSearchedTitle) > -1)
                    {
                        this._blnSearchedExplorer = true;
                    }
                }
                catch (System.Exception exc)
                {
                    if (nI >= _iIEnr - 1)
                    {
                        return;
                    }
                }
                //
                if (this._blnSearchedExplorer)
                {
                    this._strContent = "";
                    this._strContentAll = "";
                    mshtml.FramesCollection oFrameCol = _objDocument.frames;
                    this._iFrameNumber = oFrameCol.length;
                    if (_iFrameNumber == 0)
                    {
                        try
                        {
                            this._strContent = _objDocument.body.outerHTML;
                            this._strContentAll = this._strContent;
                        }
                        catch (System.Exception exc)
                        {
                            return;
                        }
                        return;
                    }
                    this._strContent = "";
                    this._strContentAll = "";
                    this._iFrameNumber = 0;
                    IHTMLElementCollection iElcol = _objDocument.getElementsByTagName("frame");
                    foreach (IHTMLElement iEl in iElcol)
                    {
                        HTMLFrameElement frm = (HTMLFrameElement)iEl;
                        DispHTMLDocument doc = (DispHTMLDocument)((SHDocVw.IWebBrowser2)frm).Document;
                        if (_iFrameNumber > 0) this._strContentAll += Convert.ToChar(2); //STX (start of text) = ASCII CHAR(2) 
                        this._strContent = doc.body.outerHTML;
                        this._strContentAll += this._strContent;
                        _iFrameNumber++;
                    }
                    return;
                }
                else
                {
                    this._strContent = "";
                    this._strContentAll = "";
                    _iFrameNumber = -1;
                    _strLocationURL = "";
                    _strTitle = "";
                }
            }
        }

        #endregion

    }
}