抽奖游戏，用.net框架平台实现的小游戏，趣味性强，实现了事件消息机制，也值得学习。-Lottery games, with. Net fr a mework platform of small games, fun, and realize the event message mechanism is also worth learning.

生成mdi文件，系统碰到mdi的时候会自动以打印的方式处理。所以，不管用什么模板，什么方式；能在PrintPage事件处理中,生成一张要打印内容的图片就OK了! -Mdi file generated, the system will be encountered when mdi automatically print manner. Therefore, no matter what template, in what way