property List.SelectColumnIndex as Long
Retrieves or sets a value that indicates control column's index where the user is able to select an item. 

TypeDescription
Long A boolean expression that specifies whether the user selects cells only in SelectColumnIndex column, while the FullRowSelect property is False

By default, the SelectColumn property is False. The SelectColumn property has effect only if the FullRowSelect is False. The control displays the selected cell in the SelectColumnIndex column. The SelectColumnIndex property specifies the index of selected column. Use the SelectableItem property to specify the user can select an item.