TAPI support is at the operating system level. Outlook has had add-ins available for years that can do incoming call lookups. There should be some listed at http://www.slipstick.com/addins/

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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
> Does outlook 2007 support TAPI lookup on inbound calls? We use Outlook to
> make outbound calls but would like it to do screen pops of our contacts on
> inbound calls. ACT and Maximizer both support this capability. Please let
> me know if this is possible. THANKS