Determines the thickness of the splines drawn in this SplineChart. The thickness, or spline width, is measured in pixels, and it can have values between 0 to 10. Setting a spline thickness of 0 allows developers to essentially set splines to an non-visible state.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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