A reference to a Group object which represents the parent group of the group margin. If the group is one of the grid's top-level groups, then a null reference (Nothing in Visual Basic) is returned.
Requirements
Target Platforms: 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