This program is made to show and explain how to easily get a ball to bounce around a window. The code is simple. The explanation and documentation is thorough enough for a newbie.
Bouncing Ball演示了如何方便地将一个小球从窗体的边缘弹起。代码简单。有良好的文档和注释。
来源: http://www.programmersheaven.com/zone2/cat262/22127.htm