> I am designing a database in Access 2002 and want to offer the
> options of Complaint, Compliment or Enquiry. I am using yes/no box
> for each option and want to create a rule whereby only one box can be
> picked.
Use one field instead of three where you store...
1
2
3
...to represent Complaint, Compliment, and Enquiry respectively. Then you
use an OptionGroup frame with three RadioButtons (one for each choice).
Then the OptionGroup automatically enforces the one-choice-only feature.

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Rick Brandt, Microsoft Access MVP
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RBrandt at Hunter dot com