using VB and an MO to achieve a simple query system, can achieve amplification,...

代码说明：

一个用VB和MO实现的简单的查询系统，可以实现放大、缩小、图层控制以及图形和属性的查询-using VB and an MO to achieve a simple query system, can achieve amplification, narrow, layer control, and graphics and attributes of inquiries