I am attaching your example having introduced the concat () function.
Select one or more values from the list box customers, choose the separator (I've put a few examples that you can add or modify).
In the text box you will see the customer values, if you do not select Nula, a message invites you to do so.
WIth this method then you can do so many things.
If you need do not hesitate.
After introduction the alternate state for duplicate the control e pilote the selection from & to text box!
Customer_by_ValerioFatatis.qvw 156.0 K