经常有用PB开发的管理系统需要提供接口供其他系统调用，本例子就是通过VC开发出的一个调用PB程序，访问PB程序中的数据对象的例子。(Often useful PB development management system needs to provide interface for other system calls, this example is through the VC developed a call PB program, access to PB program data o