This would be simpler if I was writing the program from scratch. The problem is that this is an existing program, written by someone else, that is command-line-driven with a Unix-XWindows-C graphical interface to display data fitting results. I just want to replace the XWindows drawing utilities with something less platform-specific....

To make things even more interesting, the calculation program is written in FORTRAN. I'm planning to use C wrapper functions to mesh the FORTRAN with the Perl rather than try to directly call Perl from FORTRAN. I'll stick to the existing function call format rather than muck around with the FORTRAN.

Thanks,
Diane.