说明：  DAO就是Database Access Object，数据库访问对象的英文缩写。在VB中提供了两种与Jet数据库引擎接口的方法：Data控件和数据访问对象（DAO）。Data控件只给出有限的不需编程而能访问现存数据库的功能，而DAO模型则是全面控制数据库的完整编程接口。
(DAO is the Database Access Object, abbreviation of database access objects. Provided in both VB and the Jet database engine interface methods: Data Control and Data Access Objects (DAO). Data are given only limited control without programming and have access to the function of the existing database, and DAO full control of the database model is a complete programming interface.)