(setq acApp (vlax-get-acad-object))
  (setq	C3D (strcat "HKEY_LOCAL_MACHINE\\"
		    (if	vlax-user-product-key
		      (vlax-user-product-key)
		      (vlax-product-key)
		    )
	    )
	C3D (vl-registry-read C3D "Release")
	C3D (substr
	      C3D
	      1
	      (vl-string-search "." C3D (+ (vl-string-search "." C3D) 1))
	    )
  )
  (vla-getinterfaceobject
    acApp
    (strcat "AeccXUiLand.AeccApplication." C3D)
  )