多线程程序的编写，多线程应用中容易出现的问题。如何利用命名互斥对象保证应用程序只有一个实例运行,这是应用多线程编写网络聊天室程序。-Procedures for the preparation of multi-threaded, multi-threaded applications easily arise. How to use named mutex object to ensure that there is only one example of the application ru