Is there a different command for bringing up the View Creation dialog box inside CADWorx Structure?

I've tried the typical VIEWBOX at the command prompt, but it defaults to VIEWBOXDEFINITIONSTR. It then comes up with a completely different dialog box, and doesn't transfer the views to AutoCAD's View Manager.

It's then impossible to create a viewport based on the picked points for a view box, because the information isn't transferred to the View Manager.

What am I missing? A little help please!!!