Does Static Library need to export functions?

I have inherited a VS 2005 solution which contains a C dll project and a Fortran static library project.  The C dll project requires the Fortran routines.  I have updated the solution for VS2010.

The C dll project has the Fortran library added as an Additional Dependency.  I have also added the Fortran library to C dll project.

However, the C project build show unresolved symbols for each of the Fortran routines.

If I add !DEC$ ATTRIBUTES DLLEXPORT to the Fortran routines, then I get no complaints.

Do I really need to export the routines from a static library, or have I missing something?

Regards, Mike