dynamic_sysop
Senior Contributor
Howdo, I've been working on this for a couple of days, I did a VB.NET example of this on a forum a few years ago, but C# presented me with a new challenge & it took a while to figure out.
The Idea is to get hold of an open instance of IE ( IE7 in this case ) & grab hold of it's IHTMLDocument2 Interface, giving the ability to manipulate that external Internet Explorer window / grab it's url address, it's html, make it navigate elsewhere, etc...
when this code is added to a project, you must make a reference to Microsoft.mshtml
The Idea is to get hold of an open instance of IE ( IE7 in this case ) & grab hold of it's IHTMLDocument2 Interface, giving the ability to manipulate that external Internet Explorer window / grab it's url address, it's html, make it navigate elsewhere, etc...
when this code is added to a project, you must make a reference to Microsoft.mshtml
C#:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
using mshtml;
namespace HookBrowser
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
#region API CALLS
[DllImport("user32.dll", EntryPoint = "GetClassNameA")]
public static extern int GetClassName(IntPtr hwnd, StringBuilder lpClassName, int nMaxCount);
/*delegate to handle EnumChildWindows*/
public delegate int EnumProc(IntPtr hWnd, ref IntPtr lParam);
[DllImport("user32.dll")]
public static extern int EnumChildWindows(IntPtr hWndParent, EnumProc lpEnumFunc, ref IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "RegisterWindowMessageA")]
public static extern int RegisterWindowMessage(string lpString);
[DllImport("user32.dll", EntryPoint = "SendMessageTimeoutA")]
public static extern int SendMessageTimeout(IntPtr hwnd, int msg, int wParam, int lParam, int fuFlags, int uTimeout, out int lpdwResult);
[DllImport("OLEACC.dll")]
public static extern int ObjectFromLresult(int lResult, ref Guid riid, int wParam, ref IHTMLDocument2 ppvObject);
public const int SMTO_ABORTIFHUNG = 0x2;
public Guid IID_IHTMLDocument = new Guid("626FC520-A41E-11CF-A731-00A0C9082637");
#endregion
public IHTMLDocument2 document;
private void button1_Click(object sender, EventArgs e)
{
document = documentFromDOM();
/// check that we have hold of the IHTMLDocument2...
if (!(bool)(document == null))
{
this.Text = document.url;
}
}
private IHTMLDocument2 documentFromDOM()
{
Process[] processes = Process.GetProcessesByName("iexplore");
if (processes.Length > 0)
{
IntPtr hWnd = processes[0].MainWindowHandle;
int lngMsg = 0;
int lRes;
EnumProc proc = new EnumProc(EnumWindows);
EnumChildWindows(hWnd, proc, ref hWnd);
if (!hWnd.Equals(IntPtr.Zero))
{
lngMsg = RegisterWindowMessage("WM_HTML_GETOBJECT");
if (lngMsg != 0)
{
SendMessageTimeout(hWnd, lngMsg, 0, 0, SMTO_ABORTIFHUNG, 1000, out lRes);
if (!(bool)(lRes == 0))
{
int hr = ObjectFromLresult(lRes, ref IID_IHTMLDocument, 0, ref document);
if ((bool)(document == null))
{
MessageBox.Show("No IHTMLDocument Found!", "Warning");
}
}
}
}
}
return document;
}
private int EnumWindows(IntPtr hWnd, ref IntPtr lParam)
{
int retVal = 1;
StringBuilder classname = new StringBuilder(128);
GetClassName(hWnd, classname, classname.Capacity);
/// check if the instance we have found is Internet Explorer_Server
if ((bool)(string.Compare(classname.ToString(), "Internet Explorer_Server") == 0))
{
lParam = hWnd;
retVal = 0;
}
return retVal;
}
}
}
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