autocad二次开发， 含lisp源码 及演示 选择一个或多个填充,要求被选择的填充颜色自动变成251,然后统计所选填充的面积,并将总面积写在屏幕上,即text在屏幕上. -autocad secondary development, including source code and demo lisp Select one or more filling, asked to be chosen automatically filled into 251 colors, and th