一个采用VB写的工厂管理程序，可帮助初学者了解数据库与VB的使用-Factory using VB to write a management program that can help beginners learn the use of databases and VB

一个个人自己编写的c#的源程序,实现了使用工厂Factory类(A personal writing your own c # source program, implemented using a Factory Factory class)