说明：  基于ArcEngine的GIS软件二次开发 实现地图空间查询功能（通过在地图上画多边形查询所选要素的属性表） 通过画多边形实现空间查询 如果需要通过画直线查询属性，只需将代码注释段 的注释去掉，再将其下面的那段代码注释起来即可！
(Arcengine gis software based on the second development space for the implementation of the functions mapped （ through an inquiry, the selected elements of the property table ） by polygons query if the need for space by line for properties, just put the code comments from the comments and the part of the code comments to you! )