ValEdit

For each item that it allows users to edit, the TValueListEditor component maintains a TItemProp object. This object's properties govern how users can edit the value in the value list editor. 

TItemProp objects are created and owned by the value list editor that uses them to represent properties of item values (such as an edit mask or maximum length) or to supply a fixed pick list of values that users can assign to the item. 

TValueListEditor