macOS Using airport with a program

Search for "Apple80211.h" on google, that should do the trick.
If you have any questions after checking that just ask, i would be glad to help.

A header file, and the prototypes it contains, gives you a peek at what methods are supported. This can be avoided in Java because even with the "binary" distribution of class files in a library, the object and method names and arguments are still present.

In C and C-alike languages the header file tells the compiler that at link time or load time for dynamic libs a function with that signature will be available.

It also serves as bare-bones documentation for a developer to know what methods are provided.

-Lee

Include the header and link the target with the private framework Apple80211.framework.
Just remember that is a reverse engineered header and has some limitations, for example if Apple changes the framework maybe your program will stop working, but i use it in leopard and it works fine and the Apple80211 framework version appears to be the same in Snow Leopard (i saw some screenshots somewhere).