2.2.9.3 PidTagWlinkGroupHeaderID Property
Type: PtypBinary ([MS-OXCDATA] section 2.11.1)
The PidTagWlinkGroupHeaderID property ([MS-OXPROPS] section 2.1072) specifies the ID of the navigation shortcut, as specified in section 2.2.9, that groups other navigation shortcuts. This property SHOULD be set only when the value of the PidTagWlinkType property (section 2.2.9.5) is wblHeader.