Viewing and Updating Object Properties
From AutoCAD AutoLISP & Visual LISP
Converting Other AutoLISP Data Types for ActiveX Methods
Using Visual LISP Functions with ActiveX Methods
Reading Object Properties
VLISP provides AutoLISP functions for reading and updating object properties. You can use these functions to obtain the properties of existing drawing objects (for example, the center point of a circle), and to modify drawing objects (for example, moving the center point of the circle).