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Expression Service

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The Jet Expression Service (possibly referred to as ACE Expression Service in versions later than 2003) is the service which evaluates expressions used in Control Source expressions, expression columns in Query objects, as well as Access 2010's Calculated data type in Table objects.

Syntax Examples:

=ThisFunctionName(Forms!MyForm!MyControl.Value)
=ThatFunctionName([Forms]![This Form]![This Control])
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This page has been accessed 4,331 times.  This page was last modified 12:45, 1 August 2012 by Jack Leach. Contributions by Brent Spaulding  Disclaimers