The source code for BlueBox, showing the architecture and including some GUI widgets, is available here: http://www.dloo.com/bluebox/download.html Pipers, PLEASE download it, look it over, and post comments. Cheers. Jeff -- J.W. Bizzaro jeff at bioinformatics.org Director, Bioinformatics.org: The Open Lab http://bioinformatics.org/~jeff "Let the machine do the dirty work." -- Kernighan and Ritchie --