To my knowledge the Express editions can't create Office COM addins, but I
haven't used any of the Express editions so I'm no expert. You're probably
best off posting this in a forum devoted to Visual Studio where there would
be more expertise in the different editions of VS 2008.

Signature
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
>I have just downloaded Visual Studio 2008 Express with the hope of
> experimenting with writing my first Add-in for Outlook 2007.
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>
> Can Express (VB.Net) be used to create an Outlook 2007 Add-in?