Not enough information.

What language? Do they want to support 64-bit Outlook? Do they plan to
support the ribbon? How are they installing and what installer are they
using? Any ActiveX controls or dependencies? Any 3rd party controls? Are any
deprecated Windows OCX controls that aren't there in Vista or Win7 called?

I have some addins written originally for Outlook 2000 that run just fine as
is, others required extensive re-writes or even ports to other platforms.
Without a lot of information there's no way to tell what is required.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm


"Steve Haack" wrote in message
...
All,
I am working with a customer that has an Add-In for Outlook that was
developed for Outlook 2000 and they are currently using it in Outlook
2003.

They are planning to migrate to Outlook 2010 this summer. Can someone
point
me to what they need to know about how to make this add-in install and
work
with Outlook2010?

Thanks,
Steve