When does field validation occur?

[PatriciaW]

It is not clear to me about when FM validates a field or invokes a script. (I have posted other questions in the forums along these lines.)

My problem is that the user would like things to happen when he tabs from a field. I think that it is not possible to intercept tab keystrokes and that validation does not happen until the user hits ENTER (or RETURN.) So far, I have been unable to find this clearly defined.

Can anyone clarify this for me?

[PatriciaW]

Ok ... so I asked a dumb question. The field validation does occur when I tab out of a field. I should pay more attention. The real question is whether it is possible to invoke a script when I tab out of a field. I'm pretty sure that it is not in FileMaker, but does anyone know of any third-party products that will do this?

[PatriciaW]

I did eventually find a plug-in (EventScript) which does what I want. It is possible to make a field validation invoke a script anytime a field is changed.