get a bit more clear now, thanx~Originally posted by no-one
(A)pplication (P)rogramming (I)nterface. API.
its a set of functions, classes/structs, ect... used in easifying the programming of a specific... um... thing(task?).
such as WinAPI is used in creating windows and "communicating" between your app and with Windows.
OpenGL, and Direct-3D are API's for making graphics easier to code.
Direct-X also has many other API's , one for sound, input, networking, ect...