说明：  非常详细的介绍了ArcGIS Engine 中各类接口的定义及其用法分类，是学习ArcGIS Engine很好的帮手，很快能够上手操作
(Very detailed introduces the ArcGIS Engine of all kinds of interface in the definition and usage classification, is the study ArcGIS Engine very good help, to be able to soon started operation)