The default value is 0.
Note that the value of this property is calculated in relation to the value of the HorizontalOffsetAlignmentFrom property.
Also note that the HorizontalAlignment property must be set to None for this property to take effect.
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