VC下学校饭卡系统及串口系统编程，对利用串口及SQL编程有借鉴意义。-School SmartCard system and the system serial programming, the use of serial and SQL programming has referential significance.

VC++编写，基于SQL的即时聊天软件源代码，主程序分为客户端和服务端，仿MSN程序界面，用户注册后即可聊天-VC++ to write SQL-based instant messaging software source code, the main program is divided into client and server, imitation MSN program interface, users can register to chat

VC 写的sql数据库操作，包括各类功能-VC write sql database operations, including various types of functions