▍1. Circle_Picture
这是一个简单的画圆功能,主要让用户学会如何利用Windows提供的画图工具,用户单击鼠标右键则会弹出对话框选择线宽,在菜单上也设计了圆的颜色选择菜单。(This is a simple function of the Circle. mainly for users to learn how to use Windows for the drawing tools, Users right-click pop-up dialog box will be chosen linewidth, the menu also designed a circular color choice menu.)