Pro/Program primarily automates the Model tree though it can also include relations as well.
National Instruments has a module specifically for interfacing with Solidworks - NI SoftMotion for SolidWorks, however the only info I can find for it indicates this was only for NI Softmotion 2009 running on NI LabVIEW 2009.
There are later versions of Softmotion, but I see no references to later versions of the interface to SolidWorks.
It's probably a dead end, but maybe a call to National Instruments would get better feedback on how they manage outputs in a way that could be used with Creo.
Edit:
This is a link to a post in which NI indicates they had no interest in this for any other CAD system and it took them 3.5 years to develop: http://blog.dasisolutions.com/2009/10/19/virtual-prototyping-comes-to-mechatronics-design-with-event-based-simulation/ I guess that explains why they never updated it either.
