YOu might want to ask this question in an Access discussion group rather than in a discussion forums for Microsoft Outlook contacts issues.

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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
>I am working in MS-Acess a query is given like this
> "SELECT * FROM tablename WHERE field='-#####'"
> i cannot under stand why we give field='-#### '
> can any one explane