使用关键代码段的例子，对学习使用关键代码段是很好的例子，这些都是很好的例子源码。-these are the demos of critical section,to learn how tos use critical section which are good useful,and they are very useful source codes.

20071121二进制通讯七段码显示OK2 0071121二进制通讯七段码显示OK()