The DialogListSubItems object lets you query or modify the subitems belonging to a DialogListItem. Use the subitems property to obtain this object from a list view item in a script dialog.

You can enumerate this object to query the subitems. Each subitem is represented by a DialogListSubItem object.  

You can also address a specific subitem by index; for example, subitem(0) represents the item's first subitem (that is, the string in the second column).