AutoCAD 2021 VS Code Update: for AutoCAD Expert's Visual LISP

With Version 2021, Autodesk announced its intention to remove the Visual LISP Integrated Development Environment (VLIDE) replacing it with the Visual Studio (VS) Code source editor. This is an open-source editor that can be used to develop programs in almost all known languages. This code editor features IntelliSense code completion, syntax highlighting, bracket-matching, auto-indentation, box-selection, snippets, and more. It also includes an interactive debugger, to step through source code, inspect variables, view call stacks, and execute commands in the console. And it has built-in support for Source Control Management by installing Git, a system for tracking changes in source code during software development.Having previously published the AutoCAD Expert's Visual LISP book which is based on VLIDE and considering that most of its content from this book related to AutoLISP / Visual LISP programming will not change and that only the chapters dedicated to the development environment would have to be modified, I have decided to publish AutoCAD 2021 VS Code Update including all those changes that would be necessary to make to the original book's text.As the situation above has not changed with the release of AutoCAD 2022, we now include in this Second Edition of the book, the few things added with the most recent version of the AutoCAD AutoLISP Extension. We are also expanding the information on the commands used in the management of Source Code Control.