Hi, if your task is only to choose one from three possible selections, I suggest Procomm Plus. You can manage this simple task with its scripting language. If your problem is rather complex, I suggest the Micro-C for PC from Dave Dunfield (www.dunfield.com). I personally use it with success. It has a built-in interrupt-driven serial communication interface. Better yet, it has menuing and windowing environment, and it is pretty bug-free. For $25 is a true bargain. The only minus it does not support floating-point numbers. I hope this helps. Imre On Mon, 28 Sep 1998, Steven Kosmerchock wrote: > PICListers, > I am attempting to control a PIC16C65 via RS232. I have all the details of the RS232 connection completed but have a question on the PC program I need. I want to have three different possible selections which are made via user through PC. After selection is made the PIC does what it is programmed to do. Question: Wha t language should I write the user interface in?? I've never done this before, ( tried to control something via PC) and I am not sure where to start. Should it, or can it be done by either QBASIC or C?? What about ProComm Plus?? Any suggesti ons would be of great help!!!!! Thanks in advance!!! > > Best regards, > Steven > > > Steven Kosmerchock > Email: steve.kosmerchock@celwave.com > www.geocities.com/researchtriangle/lab/6584 > >