It depends on what error and where it came from. I've found errors fired by
embedded Web browser controls used in some Outlook projects that will fire
errors that can't be trapped from VB or Outlook, they are Windows unhandled
exceptions and there's not much you can do with that.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Christoph" wrote in message
ups.com...
Thank you Ken!

I think I included all workarounds of getting the common Add-In
problems. And now I don't know how to make it better. (I checked the
code for so many times without finding an error)
My Add-In does a lot and maybe I have to live with problems, because
the whole COM thing is buggy and can cause many problems.

Another question:
Sometimes I have to depend on the error handling because some objects
are causing errors but only in really rare cases which I don't know.
(Normally I don't get errors, when I uncomment the error handling)
Although I'm using "On error goto... or ...resume next" an error
can cause an Outlook crash?