windows API（非MFC） 组播代码

本代码时对局域网中多播通信的实现，有加入多播组功能，退出多播组功能，多播显示发送接收消息等。-The code of LAN Multicast Communication, a multicast group by adding features from the multicast group function, multicast, etc. show the send receive messages.

判断IP是否有效-To determine the validity of IP

udp协议仿真程序（接受端）-udp agreement simulation program (receivers)

NIS安装视频,对于初次配置NIS服务器的工程技术人员有很重要的参考价值-NIS installation of video, for the first time to configure NIS server engineering and technical personnel have a very important reference value

vc编的tcp和udp服务器，客户端，很好用-vc series tcp and udp server, client, a very good use

mfc开发的通信程序，提供注册功能 简单的聊天室，注册后可以进行聊天-mfc communication program developed to provide a simple registration functionality chat rooms, chatting after registration can be

一个简单的vc聊天室程序供对使用vc进行网络编程感兴趣的人参考代码是相对完整的并且本人对其进行了尽可能的简化处理以方便vc 初学者学习-a simple vc chat room procedures for the use of network programming vc interested in the reference code is relatively complete and I waged a simplified as much as possible to facilitate vc beginners learning

该代码实现机对机聊天，抓取对方屏幕，传送文件，可实现TCP/UDP切换-the realization of machine code for the aircraft, chatting with each other screen crawls, and transmission of documents, TCP/UDP handoff

一个基于RTP协议的例子-an agreement based on the example of RTP

一个不错的TFTP源代码-a good source TFTP