VC++ 开发的地理信息系统源代码，包括美国的数据，必须安装Mapinfo插件。-VC development of the geographic information system source code, including the United States, to be installed Mapinfo plugin.

利用vc中的mapobject插件实现对地图的基本操作，如放大缩小，鼠标变形，几何查询，属性查询，鹰眼视图等。同时附带文档中提到的所需的头文件。-Plug-in mapobject using vc map to achieve the basic operations such as zoom, mouse deformation, geometric query, attribute query, view, etc. Eagle Eye. At the same time with the