I have a fortran DLL built in the CVF convention and my c++ code built using cdecl calling convention to get the stuff it needs from my DLL. I checked in my c++ code obj files and the symbols are '_imp_variable'. Then in my fortran dll the symbol shows up as 'variable'. I got some linker errors (unresolved external symbol _imp_variable), is it because c++ is looking for '_imp_variable' exactly as is in my DLL? Or does VS cdecl calling convention just adds stuff weirdly but it knows to look for 'variable'?
Prefix __imp__ is added by __declspec(dllimport) storage-class attribute. It means that object or function is imported from DLL using import library (usually created by linker on DLL build). Make sure you added such library to your project.
If for unknown reason you don't have import lib or DLL sources take a look here: http://support.microsoft.com/kb/131313