CIRC A simple circle control that illustrates painting, stock properties, custom properties, mouse events, custom events, adding text and fonts, property pages, and data binding.

• CIRC简单的圆形控件,它阐释绘图、常用属性、自定义属性、鼠标事件、自定义事件、添加文本和字体、属性页以及数据绑定。