Hello,

The short C# example below based on the BandObject library
(http://codeproject.com/csharp/dotnetbandobjects.asp).  The key thing
I'm doing is handling the DocumentComplete event and then within this
accessing Explorer.Document.  I have found that if you open a PDF file
embedded within a new browser window (not the same IE window, but a
new IE window) that, upon closing the IE window with the PDF file, IE
crashes.  If I do NOT access Explorer.Document (comment out the line
below in DocumentComplete) then the crash does not occur.  Any PDF
file will suffice.  For example:  www.macromedia.com/software/central/
whitepaper/central_wp.pdf

Steps to reproduce:
1. Build this program and regasm it
2. Start IE and make sure it is running (need to unclick and reclick
the toolbar menu option)
3. Goto http://www.macromedia.com/software/central
4. Right click on the whitepaper PDF link and click "open in new
window"
5. Now close the newly opened window and IE will crash

My questions are:
1. Why does it crash?  Why can't I access Explorer.Document if a PDF
file is embedded in the window?
2. Assuming there is some reason I cannot, then what is the best way
to know NOT to access Explorer.Document?  Is there a better way than
just checking the URL to see if it ends in ".pdf"?

Thank you.
Steve

----

[System.Runtime.InteropServices.Guid("4FB26B73-D6E6-4e1f-A8BE-4980D1760EAC")]
public class MyBandObject : BandObjectLib.BandObject
{
    public MyBandObject()
    {
        this.ExplorerAttached += new
System.EventHandler(this.ExplorerAttachedHandler);
    }

    private void ExplorerAttachedHandler(object o, System.EventArgs e)
    {
        this.Explorer.DocumentComplete += new
SHDocVw.DWebBrowserEvents2_DocumentCompleteEventHandler(this.WebBrowser_DocumentComplete);
    }

    private void WebBrowser_DocumentComplete(object pDisp, ref object
theUrl)
    {
        if (this.Explorer != null && this.Explorer.ReadyState ==
SHDocVw.tagREADYSTATE.READYSTATE_COMPLETE)
        {
            object o = this.Explorer.Document;
        }
    }
}