AutoCAD 2020 API History Reference (ActiveX)

Additions and changes made to the ActiveX API in AutoCAD 2020 and AutoCAD 2020-based products.

Classes

AcadApplication
        Minor version number of the class has been incremented from 23.0 to 23.1

        Use the ProgID AutoCAD.Application.23.1 to create an instance of AutoCAD 2020 or 
        ProgID AutoCAD.Application.23.0 to create an instance of AutoCAD 2019, when installed.

        ProgID AutoCAD.Application.23 can still be used to create an instance of AutoCAD 2020, but 
        there will be inconsistencies in execution when installed side-by-side with AutoCAD 2019.
IAcadComparedReference (New)
        Inherits from IAcadExternalReference