AutoCAD ObjectARX Program Development Technology

Author: Li Changxun, Editor-in-Chief
Publisher:
Publish Date: 2005-01-01
Features: Autodesk's AutoCAD is currently the most widely used computer-aided drawing and design software package. ARX (AutoCAD Runtime eXtension) is one of the third-generation development tools for AutoCAD, introduced after AutoCAD R13. It is an object-oriented development environment and application programming interface based on C. ARX programs are essentially Windows dynamic link library (DLL) programs that share the address space with AutoCAD, directly call AutoCAD's core functions, and can directly access the core data structures and code of AutoCAD's database. This allows for extending AutoCAD's inherent classes and functions during runtime, creating new commands that fully enjoy the privileges of AutoCAD's built-in commands. ARX programs communicate directly with AutoCAD and Windows using the Windows message passing mechanism. Given the widespread use of AutoCAD and the urgent need for secondary development, coupled with the relative scarcity of such books on the market—especially introductory ones—author Li Changxun wrote this ObjectARX Development Guide based on his own learning experience. The book is divided into three parts: Beginner, Intermediate, and Advanced. The Beginner section provides extensive introductions to ObjectARX and the programming environment, illustrated with visuals, making it highly suitable for beginners. The Intermediate section offers detailed discussions on the fundamental knowledge and theories of ObjectARX, including numerous examples for readers to explore and understand. After studying this section, readers should be able to independently complete most AutoCAD secondary development tasks. The Advanced section briefly explains some advanced applications of ObjectARX to broaden readers' horizons and guide those interested in reaching a higher level. This book can serve as an introductory guide for AutoCAD beginners, as well as a resource for intermediate readers who have mastered some basic knowledge and wish to improve further. It can also be used as a reference book for professionals with some experience in using AutoCAD.