Dear Chief, I have one "strange" question: I have some libraries written for Qbasic under DOS: they are used to communicate, via RS232C, with a device which can read analogic and digital inputs and control relais and stepping motors. My question is: do you think it could be possible to link these libraries and write a wrapper unit to control the interface from within GPC in MingW/DJPP? If necessary, I can send you the binaries (the software isn't any longer sold nor supported ). Thank you, best regards Silvio a Beccara