I work on the LabVIEW Group and recently we made available a package that allow you to do 3D rendering in a picture control. You can download it freely from the our website:
http://zone.ni.com/devzone/conceptd.nsf/webmain/9672F024704DE89086256ED100620A56?opendocument&Submitted&node=200061_US
It comes with some examples and also allow you load WRL models. So, I think that it would be easier to use this package instead to try to interact with an external product, specially using Activex. Some objects can be pretty complicated.
Hope this would help.
Barp - Control, Simulation, RTT and HIL - National Instruments