派生CSocket类进行数据收发，实现简易聊天室功能，有在线用户列表，能群聊，私聊，屏蔽公聊、私聊等功能。是学习CSocket网络编程的经典例子。-CSocket derived class to send and receive data, achieve simple chat room feature, there is a list of online users to a group chat,私聊, shielding the public chat,私聊functions. CSo