I modified the Standard Archicad 24 INT library, precisely the windows parts, I added a new parameter in the GDL to list the recess area of the window, separately the inside and the outside of it.
You can download it from:
https://drive.google.com/drive/folders/1667l8u5T-l4Gc7l4ybF4zTa3HUP44l7M?usp=sharing
One is the modified LCF the second is a window scheme, everything works on the RECTANGULAR windows, working on it to make it work on the round windows to.