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Stephen Preston

SD9843: AutoCAD APIs: Meet the Experts

(Duration 59:46)

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Key Learning

Key Learning

  • Get to know some of the people who write the APIs you use
  • Meet your fellow AutoCAD programmers
  • Find the answers to questions you never knew you had
  • Feed your inner geek



This is the #1 geek-out event for Autodesk, Inc., API programmers. Our panel of hardcore ObjectARX API and AutoCAD .NET API experts from the AutoCAD Development Team is ready to answer your programming questions. If you're writing plug-ins for AutoCAD software, this is the perfect forum to get to know the people who create the APIs you work with, as well as your fellow programmers who use those APIs. Come and ask questions, add your expertise to the discussion, or just listen and learn.

Target Audience

Target Audience

AutoCAD programmers using the ObjectARX and .NET APIs.



Stephen Preston

Stephen Preston works at Autodesk, Inc., as a developer advocate. That means he and his team have 2 jobs: to help you use Autodesk’s APIs to build applications and add-ins that incorporate Autodesk technology, and to tell the Autodesk Product Development Teams what APIs you need to build those applications. Stephen lives in California with his wife, a dog, 2 cats, and 4 chickens.

Lee Ambrosius

Lee Ambrosius is a principal learning content developer at Autodesk, Inc., for the AutoCAD software and AutoCAD LT software products. He works primarily on the CAD administration, customization, and developer documentation. Lee has also worked on the user documentation for AutoCAD on Windows and Mac. He has presented on a wide range of topics at Autodesk University over the past 10 years, from general AutoCAD customization to ObjectARX technology. Lee has authored a number of AutoCAD-related books, with his most recent projects being AutoCAD Platform Customization: User Interface, AutoLISP, VBA, and Beyond and AutoCAD 2015 and AutoCAD LT 2015 Bible. When he’s not writing, you can find him roaming various community forums, posting articles on his blog, or tweeting AutoCAD-related information.

Albert Szilvasy

Albert Szilvasy has been with the Autodesk, Inc., AutoCAD Team since 1999, and he has worked on many areas of the product, including AutoCAD .NET API, AutoCAD OEM software, and most recently, AutoCAD I/O software.

George Varghese

George Varghese has been with Autodesk, Inc., for over 15 years, working in the AutoCAD Group, and primarily in the AutoCAD Software Development Group. He worked on AutoCAD software features like Tool Palette, Table, Ribbon, and others. Lately, he has started working on the security features in AutoCAD software, dealing with digital signatures in AutoCAD software. He worked on the feature to be able to digitally sign lisp files. The lisp files are the primary threat vectors used by attackers to target AutoCAD software users. He worked on the “Trusted Publisher” feature that aides the user in discerning the plug-ins that come from a trusted source. He has given presentations on threat modeling to a number of internal Autodesk groups. He also gave a presentation on cryptographic algorithms and x.509 certificates to an internal Autodesk audience in an informal setting.

Davis Augustine has been a bit twiddler in the AutoCAD Software Development Group for over 15 years, working on various parts of the product, mostly in the core and acdb areas. He has been involved in security for the past couple of years, including the areas of secure APIs, path searching, static analysis, compiler and linker switches, and buffer overrun prevention.

Tekno Tandean has been a code monkey for the last 18 years for the AutoCAD Software Development Group, working on C++, COM, and .NET APIs. He was pulled into an AutoCAD security related incident few years back, and has been contributing to make the AutoCAD ecosystem safer by hardening AutoCAD code, and raising awareness of secure development.

Kean Walmsley

Kean Walmsley is a software architect for AutoCAD software products with Autodesk, Inc. He writes regular posts for his popular development-oriented blog, Through the Interface.

Related Classes

Related Classes



  • 2015
  • SD9843
  • AU Las Vegas


  • AutoCAD


  • Cross-Industry


  • Developers