The basic file type in Visual LISP is the AutoLISP source file, which has a .lsp file extension.
Note: The 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.
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_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.
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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.
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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.
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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.)
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FAS – Compiled AutoLISP program; May be loaded and ran, or compiled into VLX files.
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LSP – AutoLISP source code; Program source files that can be loaded and ran, or compiled into FAS or VLX files.
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OB – Object code; Used internally by Visual LISP, these files contain compiled AutoLISP code used in building FAS files.
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PDB – Project database; Used internally by Visual LISP, these files contain symbol information used by the compiler.
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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.
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PRV – Make application; Defines the files and options used to build a VLX application with the Visual LISP Make Application wizard.
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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.
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VLX – Stand-alone applications; Stand-alone AutoCAD applications, which can be created using the Visual LISP Make Application wizard.