How to make lines invisible in the detail section of the access report

[Marina Chitchi]

In detail section of access report I have txtProblem. I put a line under this text. I want to make line invisible if txtProblem is null and visible if it populated (by the recordsource.

[NeoPa]

In your Detail_Format() event procedure check the value of txtProblem and set the line's .Visible property depending on what's found.