I am creating a custom form and have two listboxes: source and target. I
want the users to be able to select a product in the source listbox and click
the "Add" button that takes that selection and adds it to the target listbox.
I tried the following to no avail:

Private Sub AddButton_Click()
'Adds whatever is selected in the Source listbox to the Target listbox
With LB_Target
.AddItem LB_Source.Selected '<-Compile Error: Argument not optional
End With

End Sub

Any suggestions/insights?

Thanks.
--
-SA