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Create DCL code files.
Developing an AutoLISP-driven dialog box in AutoCAD is a two-step process. You use Visual LISP or AutoLISP to write the code that performs AutoCAD functions and actions that are represented as graphic elements of a dialog box. Certain AutoLISP functions drive a dialog box. The dialog box itself is written in a separate language: DCL (dialog control language). The two components exist in separate files, and the AutoLISP file calls and drives the DCL file.
Although DCL is not particularly difficult to learn or use, it can be tedious to write and debug. Visual DCL, or VDCL, from AutoLISP Resources makes the task much easier and far less error-prone. VDCL uses an IDE (integrated development environment)...