In this case, buffering is not even necessary, just follow this steps

- In The table tab of the table designer put the name of your function in the Rule field for record validation .
- Fill in the message if you want to (it comes up if the condition is not satisfied)

The table has to be in a Database for you to have this option (which must be the case since you mentioned a stored procedure), and that's pretty much it, you can test it right there in the database designer by browsing through the table and playing with the values.

By the way it seems ISNULL() is also necesary, I wasn't aware EMPTY() return .F. for nulls, although it shouldn't be necessary if your fields don't accept nulls.

>Can you tell me more? What I was asking about was how to do this in a BROWSE screen?
>
>Chuck
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