Creates an 
RadialGradientBrushthat contains the specified gradient stops and has the specified transform and base opacity.
 
            
            
            シンタックス
            
        
            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.
 - brushProperties
 
- The transform and base opacity of the new brush, or NULL. If this value is NULL, the brush defaults to a base opacity of 1.0f and the identity matrix as its transformation.
 - gradientStopCollection
 
- A collection of GradientStopstructures that describe the colors in the brush's gradient and their locations along the gradient.
 
            
             
            
            
            
            
            
            
            
            
            
            
            
            参照