Query-Index
This property is used in conjunction with the Item-Value and Hidden-Data properties to retrieve the value of a specific item and to manage the hidden data bind to the item.
Each item is identified by a number that corresponds to its position in the list, starting at 1.
 
Example - Retrieve the text of the third item in the list
procedure division.
...
  modify screen-1-lb-1 query-index 3
  inquire screen-1-lb-1 item-value w-value
...