ABSTRACT
AutoCAD drawings contain entities that you can manipulate using Visual LISP. Due to the legacy of Visual LISP, you can access these entity objects using two different strategies. These strategies differ based on how you address drawing objects such as lines and arcs. The older but still effective approach uses entity data types first introduced in AutoLISP. The newer approach uses the same object-oriented programming techniques as Visual BASIC and Visual C++ when interfacing with AutoCAD. You can use these approaches separately or can combine them in your programs.
