动态生成用户自定义数据窗口的通用模块设计

PB的数据窗口为数据库应用程序的开发提供了功能强大且灵活的数据库接口，由于数据窗口画笔定义的内容有时不能满足用户的需求，需要根据用户的选择，动态生成满足要求的数据窗口。文章详细介绍了一种通用模块，它模拟数据窗口quick select模式，提供一个界面窗口，由用户自己来选择数据表、显示风格和检索条件等必需的参数，然后根据用户的选择动态创建用户自定义数据窗口对象的源代码。该模块生成的源代码可以作为create()函数的参数，并创建一个能满足用户检索要求的数据窗口对象。

The design of the general module of creating a userdefined dynamic datawindow

PB's datawindow provides a powerful database interface for the database application system designers. Sometimes, the datawindow designed in the datawindow painter does not satisfy the user's requirements. Dynamic datawindow of the user's choice becomes necessary in this case. In this paper, a general module used to create an userdefined dynamic datawindow is introduced in detail. The module provides a userinterface window just as the datawindow's quickselect module. In this window, all the necessary parameters of the new userdefined datawindow such as the table, the display style and the retrieval conditions are defined by the user. The source codes of the userdefined datawindow are created by the module. By means of the function: create(), the codes can be used to create the new datawindow easily.