Each group description that is added to the GroupDescriptions collection represents one group level. By changing the group descriptions contained in the GroupDescriptions collection, group levels can be added to or removed from a listbox.
Target Platforms: Windows 11, Windows 10, 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