Hello everyone. n00b alert!

This might sound like an insult to your intelligence, but I'm just clueless on how to do it.

Here are the "files" that I have:
somefile.h
somedll.dll
somelib.lib

Basically I have a header file, dll file and a lib file. The only info I have is whatever is in the header file. Seems like just constants and function declarations.

That's pretty much all the info I know. How would I know what's inside the dll file? From my understanding of DLL's, they are just a compilation of functions. As far as the LIB file, I have no idea what's in it.

My question is, what do I do with these files? I can include the header file, but then I'm stuck after that point. I don't know what else I'm suppose to do.

I have a .cpp file in which it includes somefile.h. Don't really know how to proceed after that.

I have DevCpp that I just downloaded and currently use. I do have access to VC++ 6.0 that my friend gave me for free, but I'm not sure if I want to install it. I would like to get this working (or make it do something) using DevCpp if possible.

Thank you in advance.