EntryID is usually enough but for the complete package use both.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"jim" wrote in message
...
If I am using pst or exchange, what will make a ContactItem unique. It is
the EntryID or do I need both StoreID and EntryID?
Thanks