This article discussed about the methods of the second development in the ArcMap application of ArcInfo8, then showed how to create a customed command button in BVA environment of ArcMap to return the area for a selected polygon graphic.

• 对ArcInfo8的ArcMap环境下的二次开发方法做了一般阐述,并在ArcMap的VBA环境下创建源代码,定制了一个计算选定多边形面积的控件。