Hi Jay
Well, I'm able to sort of come close.
If you don't use the "retain text" feature, you can configure
the Text Entry Box object so that it has a single attempt. After a
failure occurs, instruct it to return to the previous slide. The
slide should display again with the text entered cleared.
Not sure if that's what you are looking for of if it will
help. No way I'm aware of to actually highlight anything though.
Cheers... Rick