Please Help me regarding printing.

I am using Windows NT network, and using account software created in Fox pro in my department of IT. I want to use a network enable shared printer from my computer that’s why this is prossible for me to print from my dos based program to print on this shared printer. I used port mapping for this printer and succesfull in printing but my boss asked me that there is also another printer on the network we also want to use this printer with this dos based software. I mean that we want to use these two printers from Dos , but how is this possible that I can use one printer as a default printer for printing and another time I use another as default from Dos, this can happen in windows but how is this possible through DOS.