A MergedHeader representing the parent header of the merged column. By default, null (Nothing in Visual Basic).
Remarks
This will be automatically set if a MergedColumn is added to MergedColumns collection of a MergedHeader
Requirements
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