一个完整的即时通信程序,用VC写的，实现了复杂的多进程多用户。是学习的理想样本。同时，可以应用到简单的商业场合。-A complete instant messaging program, VC was to achieve a complex multi-process, multi-user. It is ideal for sample study. At the same time, it can be applied to simple business applications.