@Craig, thanks for your reply and clarifying the issue.
I am working in a Windows environment, so the Linux libraries are probably not going to help. Sometimes it is possible to get library code working on Windows, but sometimes it is too much trouble. I am planning on using the Microsoft WPD SDK to start with. I was able to build some sample code that connected to the Theta. I think I understand how to modify the commands to insert the operation and property values from the Theta API reference. If I get it working I will post back with results.