'宣言 Public Overloads Shared Function Create( _ ByVal renderTarget As RenderTarget, _ ByRef radialGradientBrushProperties As RadialGradientBrushProperties, _ ByVal gradientStopCollection As GradientStopCollection _ ) As RadialGradientBrush
パラメータ
- renderTarget
 - an instance of RenderTarget
 - radialGradientBrushProperties
 - The center, gradient origin offset, and x-radius and y-radius of the brush's gradient.
 - gradientStopCollection
 - A collection of GradientStopstructures that describe the colors in the brush's gradient and their locations along the gradient.