Extent of the origin of this marker. For horizontally oriented gauges, this is expressed as a percentage of the gauge width, and is measured from the left side of the gauge. For vertically oriented gauges, this is expressed as a percentage of the gauge height, and is measured from the bottom of the gauge.
Target Platforms: Windows 10, Windows 8.1, Windows 8, 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
