Patrick,
I can see where you might want this info, but I know all the Print Report' VIs default to the default printer; however, if you weren't sure which printer was presently set as the default, then it would matter when you print - such as a color printer vs. B/W.
Here are 2 links to some default printer VIs which may help, if not, just use them as info.
http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&E091308B77D6A8C88625683A000AD4BA&cat=FD6839395C5E51CF862567AC005866A9
http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&C7659492335F6AA08625695000650A7A&cat=FD6839395C5E51CF862567AC005866A9
Good Luck, Doug