This method is used primarily by control developers and derivations of existing controls. Each HierarchicalObjectCollection is owned by a HierarchicalUIObject. For example, a Nodes collection in a Tree is owned by a particular Node. The owner Node is then the Parent of each Node within the HierarchicalObjectCollection. The nodes at the root level of the tree are owned by a hidden Owner which is also referred to as the RootItem. In this way, the tree of HierarchicalObjectCollections is referred to as being single rooted.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
