Create A Conditional Formatting Error Message

A

Andy

I have two dates in a form (start & end) running from one pop-up calendar
(Access 2003). I can use conditional formatting so that the end date changes
font etc if end<start.

Ideally, I want an error message to appear on the screen if end<start and
the user has to click 'OK' and this then empties the end date so that they
have to re-enter.

Useless with scripts etc!!!
Cheers
 
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