Okay, my response above works only if there is no code linking the TextList with fields displayed on a form. In other works, clicking on a record in the list does not bring up that record in the form. Usually this is what you want to do, so you need to refresh the linking code.
I solved this problem in Pan6 with a button (above the TextList) which when clicked ran the following procedure:
find currentclient match last+", "+first
Where last is the last name and first is the first name displayed in the ClientList TextList.
I have not converted this Pan6 database to PanX yet so I have not come up with the best way of doing this in PanX but it should not be too difficult.