When used in a CellFillLinearGradient, a value of 0.0 is at the beginning of the gradient and 1.0 is at the end of the gradient. When used in a CellFillRectangularGradient, a value of 0.0 is at the inner rectangle and 1.0 is at the outer edges of the cell.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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