所绘画出的线段类型、颜色和粗细，还有如何定 义画刷的填充颜色和类型。如何用Rectangle函数绘画矩形、用Ellipse函数绘画圆和椭圆和运用 -drawn up by the line type, color and thickness, and how to define the brush paintings filled with color and type. How Rectangle function rectangular painting, painting w