For Outlook 2003 you'd need to use a COM wrapper for Extended MAPI such as
Redemption (www.dimastr.com/redemption) or an equivalent.

--
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


"Lacroix" wrote in message
...
I am writing a vb.net add-in for outlook 2003, and need to know what is the
best way to retreive a mail item's PR_SEARCH_KEY MAPI property since CDO
is
not supported.

Thanks in advance,
--Christopher