This paper discusses the basic principle, data structure and data flowing map of 'power fee management system', and introduces its main functions.
本问讨论了“电费综合管理系统”的基本原理、数据结构和数据流图，并简要介绍了其主要功能。
Modeless dialog can exist during the program process and use the same massage map, as same as the main program, so that the dialog does not monopolize the program input data.
无模式对话框对象能在程序运行期间都存在，并与应用程序共用同一个消息循环，从而使得对话框不会垄断用户的输入。
The map is a carrier of visualization for geographical information, and map symbol is main expression of map data.
地图是地理信息可视化的载体之一，而地图符号是表达地图内容的主要形式。
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