field/length of field validation

[caseyi]

I'm aware that I can't "fix" the length of a field (eg., allowing only 5 characters for a zip code)in FMP. I saw suggestions re: using a validation message. But I'm not sure how to put it together. Should I use the length function eg., length (field) = 5, then what script should I use to pop up the message if validation fails?

[WBlanchard]

Casey, under options in the field definition window click on the validation tab. At the bottom of this window you'll see a custom message box. Click the box and then enter the custom message you want displayed. When the validation fails the message will display automatically.