I'm currently trying to write a sub-vi that takes as inputs, two comm port identifiers (COM1, COM2). It will configure two VISA serilal ports based on some fairly static values (baud, data, etc). I would like it to then output two "VISA Configure Serial Port" references. With these references, I plan (in the VI containing the sub VI) to write to one comm port and read from the other. What I'm having problems with is adding to the connector pane the two VISA serial port references. I'm not sure how to make the VISA Configure Serial Ports accessable/visible on the front panel so as to add them to the Connector pane outputs.