If you’re writing an app that uses the Ocularis SDK, you should instantiate the OCAdapter object this way:
// create OCAdapter from SDK
var type = Type.GetTypeFromProgID("OnSSI.OCAdapter.1", true);
INVRAdapter oc = (INVRAdapter)Activator.CreateInstance(type);
That way, all you’ll need is a reference to the OcularisInterface.dll and you won’t have to carry around a lot of drivers and DLL’s that are already in the SDK folder.