PC客户端TCP UDP MFC CSocket，CAsyncSocket,Socket，网络编程-TCP UDP MFC CSocket，CAsyncSocket,Socket，网络编程

一个实现组播编程的扩展类，不错的贡献给大家！(CAsyncSocketEx is a replacement for the MFC class CAsyncSocket. This class was written because CAsyncSocket is not the fastest WinSock wrapper and it's very hard to add new functionality to CAsyncSocket derived classes. This