Visual LISP provides the ability to create a single, stand-alone executable module for an application.
This module can incorporate multiple compiled and source program files, and can include DCL, DVB, and other files that your application may need. Executable Visual LISP modules are known as VLX files, and are stored in files with a .vlx extension.
The Make Application wizard guides you through the application building process in Visual LISP. The result of this process is an application make (PRV) file, which has .prv extension. The PRV file contains all the instructions Visual LISP needs to build the application executable (VLX) file.