DirctextX programming is often used in the operation of the keyboard category, P...

代码说明：

是用DirctextX编程中经常用到的关于键盘操作的类,它封装了关于键盘操作的信息,并设置有缓冲区,用于保存键盘事件.-DirctextX programming is often used in the operation of the keyboard category, Packaging it on the keyboard operation of the information and to set up a buffer zone to preserve the keyboard events.