Additions and changes made to the ActiveX API in AutoCAD 2026 and AutoCAD 2026-based products.
AcadApplication
Minor version number of the class has been incremented from 25.0 to 25.1
Use the ProgID AutoCAD.Application.25.1 to create an instance of AutoCAD 2026 or
ProgID AutoCAD.Application.25.0 to create an instance of AutoCAD 2025, when installed.
ProgID AutoCAD.Application.25 can still be used to create an instance of AutoCAD 2026, but
there will be inconsistencies in execution when installed side-by-side with AutoCAD 2025.