My thanks to John van Groningen (johnvg@cs.kun.nl) for how the C interface works. --- "Alan Grover, Technical Pb" awgrover@umich.edu +1 (743) 647-5778 Project Leader Health Media Research Lab, Cancer Center 5D04 North Ingalls Building, Mail Stop 0471 300 North Ingalls Ann Arbor, MI 48109-0471