Setting VI Parameters in LabView Action Module with TestStand API

I am starting to play around with the TestStand API and I have questions about how to configure a TSAdp.LabViewModule.

I am using a couple examples from NI and the developer community to get started:
http://www.ni.com/example/30263/en/
https://decibel.ni.com/content/docs/DOC-18401

These examples work as I expect and I understand them.  I am struggling with how to specify the VI parameter values in the module when the step type is "Action."  In other words, how do I set these parameters?

All of the examples I see use step types that have fields defined, which are accessible through the API with "AsPropertyObject."  The Action type, by default, only has the Result field.

Can I set the parameter values of a VI with the TestSTand API?  If so, how?

Thanks,

Jacob