[Dev-C++] .cpp to .lib or .a

[<age...@co...>]

I have been wanting to write my own library of classes that perform OpenGL 
functions in order to reuse code effectivley. I was thinking about adding the 
declerations in a .h file, and writing the actual definitions in a .cpp file, 
which i would convert to a .lib file. Dev-C++ uses .a, so would I just run the 
project static library to make the .a file, or is there a command line utility 
which takes a .cpp file and makes it into a .a file? Thank you for replies in 
advance.

--
~~Scott Simontis~~
Programmer