Text boxes disappear then Reappear

[Eddy]

I have a couple of text boxes on a form that I am using as labels. When I
run the following code from a control on the form those text boxes
disappear, become not visible. When the code ends they appear again. The
text boxes are not referenced in the code anywhere, at all. Any thoughts on
why? I used to have unbound labels on the form but the data jumped when the
mouse was moved so I converted them to these text boxes.


If FIELD1 = "A" Then

intAnswer = MsgBox("Field 1 Can Not Be A. " _
& "Would you like to correct it?", vbYesNo +
vbCritical, _
"Invalid Field A")
End If

Thanks.