Hey, this functionality is not available out of the box with CVI. There are a few threads on forums discussing C++ and possible work arounds that you may find useful check out http://www.cpptalk.net/re-typeof-workaround-vt9306.html or http://objectmix.com/c/26387-typeof-how-c.html
Richard S -- National Instruments -- (former) Applications Engineer -- Data Acquisition with TestStand