vc++6.0与MapGIS6.7二次开发，实现MapGIS工程、文件等的管理，包括点、线、面等的编辑与管理等，功能强大，适合MapGIS二次开发学习。,vc++6.0 and the secondary development of MapGIS6.7 achieve MapGIS project management documents, including point, line, surface, such as the editorial and management of power