There is more than one way to do it.
Which language are you planning to use to write the GUI? You can use C++ (same as the application itself), or another, like perl, python and what have you.
You need a GUI library like tk or better gtk2 or Qt (Qt is not free though). The libraries can be compiled in 64 bit, although I doubt the GUI will gain anything from 64 bit.
Last edited by Agrouf; 05-11-2006 at 10:08 AM.