以考勤管理系统为例，进一步阐述了PB中继承的概念，窗口、数据窗和用户自定义对象都可以用来继承。系统要完成的任务



¯ 员工基本信息维护。



¯ 企业的部门信息维护。



¯ 企业的基本考勤类型维护。



¯ 员工考勤的管理。



¯ 员工考勤的查询与分析。



¯ 员工奖惩的查询。-To attendance management system, for example, further elaborated the concept of inheritance in PB, windows, windows and custom data objects can be used to inherit. System to complete the task ¯　employees basic information maintenance. ¯　corporate sector information maintenance. ¯　the type of business to maintain the basic attendance. ¯　employee attendance management. ¯　query and analysis of employee attendance. ¯　employee rewards and punishments of the query.