一个小游戏了，小球在一个窗体内弹性碰撞，建议大家看看，是vc++环境，不看会后悔哦-a little game, the ball in a small window in vivo elastic collision, we look at the proposal, vc environment, do not regret oh

根据pudn spy小例子整理得到的 spy sdk,非常好用。在原基础上剔除了很多不必要的东西。建议学习时结合原例子一起研究。-According pudn spy small example finishing get spy sdk, very easy to use. Based on the original removed a lot of unnecessary stuff. Examples of learning combined with the original propo