Item-To-Delete
As soon as the value of this property is modified, the corresponding item is removed.
Each item has a unique ID that is automatically assigned at the moment it is created.
 
Example - Modify a chips-box to delete the item pointed by wk-item
working-storage section.
77 wk-item pic 9(2).
...
procedure division.
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  modify screen-1-chip-1 item-to-delete wk-item
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