I have an AfterUpdate action in a combo box that works just fine. Now, I am needing to first check to see if there is a value in a text box before running the AfterUpdate code.
Combo box name: OverrideLetterType
Text box name: DateLetterSent
Basic logic needed: If IsNull(DateLetterSent) Then
Run the code to override letter type
show a message box saying "You can't override a letter type that has already been sent"
Thanks for any suggestions.