looks like the Export method is only available on a View object and unfortunately InfoPath des not expose a view collection for you. I think your best bet would probably be to switch to the view you want to print via
ViewInfos.SwitchView("view name");
Then you can do your call to export. Then finally you can switch back to the previous view if required...
I would expect this to flick up the second view for the user for a moment while the export is taking place but I can't test it because I'm in an an airport :p