C#

private SHDocVw.InternetExplorer browser;
HTMLDocument document;
HTMLDocumentEvents2_Event DocEvents;

browser = (SHDocVw.InternetExplorer)pDisp;
DocEvents = (mshtml.HTMLDocumentEvents2_Event)document;
DocEvents.onclick += new HTMLDocumentEvents2_onclickEventHandler(DocEvents_onclick);

  // The delegate:
    public delegate void DHTMLEvent(IHTMLEventObj e);

    ///
    /// Generic Event handler for HTML DOM objects.
    /// Handles a basic event object which receives an IHTMLEventObj which
    /// applies to all document events raised.
    ///
    [ComVisible(false)]
    public class DHTMLEventHandler
    {
        public DHTMLEvent Handler;
        mshtml.HTMLDocument Document;
        public DHTMLEventHandler(mshtml. HTMLDocument doc)
        {
            this.Document = doc;
        }
        [DispId(0)]
        public void Call()
        {
            Handler(Document.parentWindow.@event);
        }
    }

browser = (SHDocVw.InternetExplorer)pDisp;
                mshtml.HTMLDocument doc = (mshtml.HTMLDocument)browser.Document;
                DHTMLEventHandler Handler = new DHTMLEventHandler(doc);
                Handler.Handler += new DHTMLEvent(this.myCallback);
                doc.onclick = Handler;

public delegate void DHTMLEvent(mshtml.IHTMLEventObj e);

        [ComVisible(true)]
        public class DHTMLEventHandler
        {
            public DHTMLEvent Handler;
            mshtml.IHTMLDocument2 Document;

            public DHTMLEventHandler(mshtml.IHTMLDocument2 doc)
            {
                this.Document = doc;
            }

            [DispId(0)]
            public void Call()
            {
                Handler(Document.parentWindow.@event);
            }

        }

  DispHTMLDocument dispDoc = (mshtml.DispHTMLDocument)browser.Document;
                mshtml.IHTMLDocument2 doc = (mshtml.IHTMLDocument2)browser.Document;
                DHTMLEventHandler Handler = new DHTMLEventHandler(doc);
                Handler.Handler += new DHTMLEvent(this.myCallback);
                dispDoc.onclick = Handler;


public void myCallback(IHTMLEventObj evo)
        {
            // Do useful stuff...
        }

While {!myHandler.hasAnswer(myQuestionCode))
{
Application.DoEvents();
}

While {!myHandler.hasAnswer(myQuestionCode))
{
   RaiseEventObject.WaitOne();
}

While {!myHandler.hasAnswer(myQuestionCode))
{
   RaiseEventObject.Reset();
   RaiseEventObject.WaitOne();
}