My group at work uses several pieces of legacy Fortran code which we've always compiled using Compaq Visual Fortran. Since CVF has not been supported for while now and is not (easily) compatible with Windows 7, I'd like to move to a more up-to-date compiler and IDE. I'm trying Simply Fortran first, since it's inexpensive and has been recommended on this forum. The thing I'm noticing is that our code seems to expect certain things - libraries, I suppose - that came with CVF. I've seen a reference to DFLIB.MOD, and I know that executables look for DFORRT.dll or DFORMD.dll. How can I find out what dependencies I have on CDF and what I should substitute for them? I'm hoping there was nothing unique about their libraries so that I'll be able to find the same resources in some open-source libraries. Any guidance will be much appreciated - thanks!