property Node.Group (Index as Variant) as Node
Retrieves an node in the group by its index.

TypeDescription
Index as Variant A long expression that specifies the index of the node in the group being requested. 
Node A Node object being requested.
Use the CountGroup and Group properties to access or enumerate the group nodes collection. Use the AddGroup method to add new nodes in the same group ( multiple parents ). Use the InflateGroupY property to specify the indentation of the group on vertical axis. Use the IsGroup property to specify whether a node was added using the AddGroup method.