BricsCAD & getInterfaceObject

Hi!

In AutoCAD I can open a dwg-drawing in the background by using ObjectDBX in a way like that:
(setq dbxdoc (vla-open (vla-GetInterfaceObject (vlax-get-acad-object) "ObjectDBX.AxDbDocument.nn") stringDwgName))

Now I was wondering, since BricsCAD knows the method vla-GetInterfaceObject, if it was possible to do the same (open a dwg-drawing in the background) with another ProgID. Unfortunately it does not work with "ObjectDBX.AxDbDocument.nn", like in AutoCAD.

Does anybody know if that is possible and if so, how? Thanks in advance.