Gets or sets the element from which the HorizontalOffset is calculated for the SignatureLine. By default, None. The HorizontalAlignment property must be set to None.
Target Platforms: Windows 11, Windows 10, Windows 7, Windows, 11, 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