PowerBuilder高级编程及其项目应用开发。pb初学者或者有一定基础的人，可以参考。-Senior PowerBuilder programming and application development projects. pb for beginners or those who have a certain base, you can refer.

pb的详细介绍及设计实例，适合初学者或者开发人员。-pb detailed descr iption and design examples, for beginners or developers.