The .lib files in this directory are for f2c, a Fortran77 to C translator, under the Visual C++ using the /ML linker option, and not for Visual Fortran (VF). Those for VF are in the directories ../vcppML, ../vcppMT and ../vcppMD. You can use a set of .lib files in one of these directories depending on which linker option among /ML, /MT and /MD you use.