Using Autocad 2014.
Entering VLISP on the Autocad command line and pressing ENTER brings up the Visual Lisp Editor.
I have a lisp-to-fas program by Alan J. Thompson dated 10.30.09 that uses vlisp-compile command to access the editor for the conversion.
It may be that these commands beginning with vlisp- are a way to invoke functions within the editor ??
Steve