The basic file type in Visual LISP is the AutoLISP source file, which has a .lsp file extension.
NoteThe Visual LISP IDE is available on Windows only.
The following is a list of the file extensions or types that are created while using the product, or that a user can create
or customize to extend the product.
- _XX – Backup files; Backup copies of edited files, maintained by the Visual LISP editor. Backup files contain the same name as
the original, except that the file extension begins with the underline character (_) and is followed by the first two characters
of the original file's extension. For example, the backup file of a LSP file has an ._LS extension; the backup of a DCL file
has a ._DC extension.
- C, CPP, CCH, HPP, HH – Language source files; Contain program source code. The Visual LISP editor recognizes the syntax of these files and color-codes
reserved words, strings, and numbers.
- DCL – Dialog control language; Contains definitions of AutoCAD dialog boxes. Visual LISP can preview these files, and you can
include them in Visual LISP executable (VLX) files.
- DSK – Desktop save; Contains Visual LISP environment and window settings. (Note: Editing this file may permanently change the
Visual LISP environment. Do not edit this file without creating a backup copy first.)
- FAS – Compiled AutoLISP program; May be loaded and ran, or compiled into VLX files.
- LSP – AutoLISP source code; Program source files that can be loaded and ran, or compiled into FAS or VLX files.
- OB – Object code; Used internally by Visual LISP, these files contain compiled AutoLISP code used in building FAS files.
- PDB – Project database; Used internally by Visual LISP, these files contain symbol information used by the compiler.
- PRJ – Project definition; Contains the location and names of all source files that build the project, as well as certain parameters
and rules on how to create the final FAS files.
- PRV – Make application; Defines the files and options used to build a VLX application with the Visual LISP Make Application wizard.
- SQL – Structured query language; Contains SQL statements. The Visual LISP text editor recognizes this file type and color-codes
the text according to SQL syntax rules.
- VLX – Stand-alone applications; Stand-alone AutoCAD applications, which can be created using the Visual LISP Make Application