What is the purpose of this function argument?

In the following code pertaining to DLLs, what is the purpose of the second argument of GetProcAddress()?

Code:

_dllFunction = ( dllFunction )GetProcAddress( hInstLibrary, "secondArg" );

Thanks in advance,

dudeguy

First Google Hit

I'm confused...

So, the second argument has something to do with the .def file that lists the exports of the dll? MSDN is sometimes written in a manner where someone is assumed to know more than he/she actually might know...

it's the name of the exported function whose address is being returned