The value assigned to the Position property represents a fraction of the area to which the gradient is applied.
For example, to add two stops of equal length, create one GradientStop with a position of .5 and another with a position of 1.0.
The first stop extends from the origin to the halfway point of the fill area, and the second extends from the end of the first to the endpoint of the area to be filled. For three uniform stops, use .33. .67, and 1.0 as the respective positions; for four, use .25, .5, .75, and 1.0, etc.
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