Disabling items in a tabular form

[sdkramer]

I've got a tabular subform that I'm when I the enrolled checkbox is checked I want the date exited field to be disabled, but only for that particular record.

I have the following code in both the on current event and the afterupdate event for the enrolled checkbox

if chkBox = 0 Then
Date_Exited.Enabled=false
Else
date_exited.enabled=true
End if


but this disables the whole column. is there any way to just disable the one records date exited field?