基本的登陆系统界面设计,没有注册,仅供学习和测试用,包括登陆,获取密码,修改密码,使用OLEDB连接建立与sql数据库进行数据交互.-The basic landing system interface design, no registration, only learning and testing, including landing, access password, change the password, use the OLEDB connection is established with the sql database for data exchange.