Q about header and resource files

I am not sure these apply to a Fortran situation.

Would a resource file be something like a DATA file?

I have data files as inputs to some of my applications.

For example: OPEN(1,file="input.dat",form="formatted,"status="old")

Likewise, would header files include MODULES, for example?

Some of this might only apply to C++ situations, and Visual Studio is supposed to do both, right?