LabelChanged Event
The LabelChanged event is sent when a TreeviewField or ListviewField node's label has been changed by the user editing the label.
This event has the following syntax:
on labelchanged [treeviewfieldname | listviewfieldname]
The TriggerNode attribute identifies the node that was changed.
The LabelChanged event occurs whenever a user changes the label text of a treeview node or a listview item.
More information: