摘要：本文介绍了局域网聊天系统的现状,存在的问题以及未来开发的目标；服务器和客户端的实现，包括了系统设计的目标、总体设计、需求分析、详细设计以及系统实现的相关内容。相对于传统通过手机，电话的聊天，局域网聊天以其独特的通讯方式也逐渐被人们所熟知。

　　首先，本系统的好处是显而易见的，它不用付太多的费用，就可以实现与好友聊天，这都是其他通讯工具所不能比拟的，还可以实现资源共享，互传。其次，用户群多，这也是很多人选择本系统来实现通讯的原因。当你生活困倦了，或者想认识一些新的朋友，都可以通过它来实现。

　　Visual Basic作为一个面对对象的语言，以其多元化的控件来实现网络通讯，其简单方便的开发模式，强大的功能，和跨平台的优势成为很多编程者的开发工具，被认为功能和操作性综合评价最高的开发工具，其独特的面对对象，在运行速度，安全性，可移植性均比传统的开发语言有很大的改进。

关键词：VB；聊天管理；Socket；服务端；客户端

Abstract:This article describes the LAN chat system status, problems and future development goals; server and client implementation, including system design objectives, overall design, requirements analysis, detailed design and system implementation of the relevant content. Compared with traditional mobile phone, phone chat, LAN chats with its unique mode of communication is gradually being well known. 

　　Firstly, the benefits of this system is obvious, it does not pay much costs, as long as can achieve with your friends chat, other communication tools can not match it, you can also resource sharing, mutual transfer. Secondly, the user group, and this is a lot of people choose to implement this system of communication reasons. When you weary of life, or would like to know some new friends, can be achieved through it. 

　　Visual Basic as an object-oriented language, with its wide range of controls to implement network communication, its development model is simple and convenient, powerful features, and advantages of a cross-platform development tools for many programmers, is considered the functions and operations the most comprehensive evaluation of development tools, its unique object-oriented, in the speed, security, portability than a traditional development language is a considerable improvement.

Keywords：VB;  chat management;  Socket； server； client