Scrolling Detection in WebBrowser Control

Question

I have the following code, which, oddly enough, works for a couple of seconds and then stops working (my event handler method stops being called):

public partial class Form1 : Form { private void Form1_Load(object sender, EventArgs e) { webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted); webBrowser1.Navigate("google.com"); } private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { if (!webBrowser1.IsBusy && webBrowser1.Url == e.Url && webBrowser1.ReadyState == WebBrowserReadyState.Complete) { HTMLWindowEvents_Event windowEvents = webBrowser1.Document.Window.DomWindow as HTMLWindowEvents_Event; windowEvents.onscroll += new HTMLWindowEvents_onscrollEventHandler(windowEvents_onscroll); } } private void windowEvents_onscroll() { HtmlDocument htmlDoc = webBrowser1.Document; int scrollTop = htmlDoc.GetElementsByTagName("HTML")[0].ScrollTop; string text = scrollTop.ToString(); } } 

Answer 1

OK Solution found:

  protected override void OnDocumentCompleted(WebBrowserDocumentCompletedEventArgs e) { Follow(); if (!IsBusy && Url == e.Url && ReadyState == WebBrowserReadyState.Complete) { Document.Window.AttachEventHandler("onscroll", DocScroll); } } 

If it is connected this way, it works fine (for now ...). You don’t even need to use mshtml.