'宣言 Protected Friend Sub VerticalTick( _ ByVal geometry As GeometryCollection, _ ByVal x As Double, _ ByVal y1 As Double, _ ByVal y2 As Double, _ ByVal viewportRect As Rect, _ ByVal renderingInfo As PathRenderingInfo _ )
protected internal void VerticalTick( GeometryCollection geometry, double x, double y1, double y2, Rect viewportRect, PathRenderingInfo renderingInfo )