I don't believe the source code was ever released to the public.

Signature
Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
Author, Google and Other Search Engines (Visual QuickStart Guide)
Outlook Tips: http://www.outlook-tips.net/
Outlook & Exchange Solutions Center: http://www.slipstick.com
Join OneNote Tips mailing list: http://www.onenote-tips.net/
> Hi, I know that Lookout for Outlook was open source before MS acquired
> them.
[quoted text clipped - 5 lines]
> Thanks
> Sunny