changing visibility of text by record on a continuous form

[diversoln]

I have a continuous form that is used to enter serial numbers. When the user types a number and presses enter, I run an event procedure to check for three possible errors.

I'd like a textbox to become visible next to only serial numbers with errors.

The the trouble is that the text becomes visible for all of the records - not just the one with the error. Any ideas on how to make the text show up next to only the serial numbers with error.