改文档提供了在VC中利用MapX实现地图的基本操作功能的详细步骤，比如：放大缩小，几何查询，属性查询，鹰眼视图，同时附带所需的三个头文件。-Change the document provides a map of the VC using MapX to achieve the basic operating functions of the detailed steps, such as: zoom, geometric query, attribute query, eagle eye view, while the three with the required header files.