I don't really know if you can attach to events in other domains,
never tried, though I tend to doubt it, but I do know that you could
attach to the event in the same domain the error occurs and raise a
custom error flag of some sort on an object that extends
MarshalByRefObject which would be visible in the other AppDomain.

It's a neat idea, and if you don't mind, I'll probably steal it from
you. :-)

Bob Aman
http://www.rapidcanvas.com

If you subscribe to the UnhandledException event in the default appdomain
you will get notifications when a UE occurs in any appdomain within that
process. In fact, subscribing to that event in the other appdomains will not
work because they never get called (a bug in the current framework).

However, none of these will get notified about a UE in a Win32 thread that
is outside the managed process. I'm not sure how you'd even do that in a
pure win32 app, let alone a managed app. It doesn't sound like that's what
you want to do, but your phrasing makes that unclear.

Yes, you can do this, just like you suggest ...

Here is a blog post that I did in response ....
http://hoser.lander.ca/PermaLink.aspx?guid=4d6820a1-c059-44bc-8b2e-84b2c6a61a39
thanks -- rich