AO对选中要素进行属性统计 增加图层，进行3D显示(VB+AO).-AO elements of the selected attributes increased layer statistics, 3D Display (VB AO).

VB+AO用于地理信息系统二次开发 该部分代码用于实现对地图要素进行选择-VB AO for the Geographic Information System development of the second part of the code used to achieve map elements choice

this is a program combined AO and VB, as to provide some basic functions of Arcmap, such as zoom in, zoom out.Useful Hopefully!