You can run any macro in a VBA project by putting the cursor inside it and pressing F5.
If you're new to Outlook VBA macros, these web pages should help you get started:
http://www.winnetmag.com/Articles/Index.cfm?ArticleID=21522&pg=1
http://www.outlookcode.com/d/vb.htm

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> To "change the form used by existing items in a folder", the help menu
> suggests changing the message code thru VBA. I copied the code to a new
> project but I'm not sure how to execute/implement this?? I am not familiar
> with VBA - please help!