This repository host previous versions of ObjectARX Training Material, the training labs from developautocad from yester years i.e. Any year which is not in current support period.
Note AutoCAD Support period- Current Release + Previous 3 Years.
For example, at the time of writing this, the current release is AutoCAD 2019, previous releases includes AutoCAD 2018, 2017 & 2016.
For latest Training Material, please visit developautocad
For any queries please write to devtech-ptd@autodesk.com