Introduction - If you have any usage issues, please Google them yourself
Useful source to help learning, Autodesk official date. NET Tutorial (C#) Chapter 1 Hello World: Access ObjectARX. NET wrapper class 1 Chapter 2. NET AutoCAD Wizard and Editor Class 2, Chapter 3 databases: the establishment of our own The Employee object database based on Chapter 4 4 2: Add custom data 9, Chapter 5 User Interoperability: tips and select 17 in Chapter 6 for more user interface: add custom data, 33 of 24 Chapter 7 cases