Thank you both

I've had a look at ADX Extension and it looks as though it may be the way
forward. It sounds as though the Outlook/ActiveX combination is too buggy
to risk.

After the holidays...

Thanks again and Merry Xmas
Tim




"Ken Slovak - [MVP - Outlook]" wrote in message
...
To add to what Sue said, you can't add anything to any of the built-in
tabs
that you see in an appointment item. You have to add any modifications to
one of the normally hidden P.2 to P.6 tabs and you cannot add additional
tabs to those that exist already.

You don't add "addins" to a form, you can add ActiveX controls. That might
just be your using a different terminology, but it's an important
distinction. Even with a tested ActiveX control that say fires all of its
events in a VBA UserForm or Windows form or VB form or whatever, those
events may not fire when the control is placed on an Outlook form. That
you'd have to determine empirically, there's no way to predict that.

Some ActiveX controls that work perfectly in other forms may also crash an
Outlook form or even crash Outlook when placed on an Outlook form and
accessed. Again, that has to be determined empirically.

--
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


"Tim Radford" wrote in message
...
Thanks for your reply Ken.

I need to embed a customised drag & drop chart and I don't think this
can
be
achieved without a custom form. I'd also like to embed a web page, but
it
must be in an appointment tab. I might be able to use an add-in but it
would
look so much neater as a tab.

I've not done anything with Outlook before (or COM for that matter) but
I
gather that an add-in could be embedded in a sub-pane of the appointment
detail. I was wondering whether I could achieve the required affect by
hiding the add-in unless a particular tab had been selected. Would I
have
access to the tab-selection event?

Your advice is appreciated.
Tim