The SelectionTree control uses the SelectionDescription event to publish a string that contains the description for the highlighted item. This string is the Description field of the Feature table. This event should be authored in the EventMapping table.
This event can only affect controls that are located on the same dialog box as the SelectionTree control.
A Text control on the same modal dialog as the SelectionTree subscribes to this ControlEvent via the EventMapping table. The Text Control uses this event to display the description of the highlighted item.