Occurs when a panel dragging operation is started.
The StartDragging event's data class is ASPxClientEventArgs.
If the ASPxDockPanel.AllowDragging option is enabled, end-users are allowed to move a panel. The StartDragging and ASPxClientDockPanel.EndDragging events allow you to perform specific actions in response to the start and end of a dragging operation.
To learn more, see the Common Docking Events topic.