实现一般的qq聊天的功能。支持文件传输 ，和图片传输的功能 ,The achievement of general qq chat function. Support file transfer, and picture transmission function

开发语言：c/c++ 简单的聊天软件 功能描述，聊天，传文件，头像，设定自己的皮肤。-Development of language: c/c++ software features a simple descr iption of the chat, chat, transfer files, picture, set your own skin.

企业QQ系统（C#3.5+MicrosoftSQLServer2000）自制UDP控件的开发过程、在局域网中实现数据的传输、在局域网中实现大图片的分流传输、如何实现多点通信、QQ视频的制作过程-Enterprise QQ system (C# 3.5+ MicrosoftSQLServer2000) homemade UDP controls development process, data transmission in LAN, the big picture of the shunt t