This event is fired when the user left clicks on the control and drags the mouse pointer out of the control area. The mouse cursor shape changes to notify that a drag is in progress. You can prevent this action by setting EVENT-ACTION to EVENT-ACTION-FAIL.

The EVENT-DATA-2 data item contains the ID of the item where the event was generated.

Note - This event is fired only if the Drag-Mode property is set to a value greater than zero and the Tree-View doesn’t have the Table-View style.