Implementation of an API All implementations of a particular API appear the same to programmers: the API merely consists of a set of procedures( or functions)that an application program can call to establish communication or send and receive data In practice, the implementation of the api depends on the under lying system Sharing API code might reside in the computer's OS or it might reside in a region of memory devoted to shared libraries Win95/ 98 uses a shared lib scheme known as Dynamic Linked Library (DLL) 哈工大计算机学院李全龙 Network Application Development Socket Programming 8哈工大计算机学院 李全龙 Network Application Development Socket Programming 8 Implementation of an API „ All implementations of a particular API appear the same to programmers: the API merely consists of a set of procedures ( or functions) that an application program can call to establish communication or send and receive data. „ In practice, the implementation of the API depends on the underlying system. „ Sharing API code might reside in the computer’s OS, or it might reside in a region of memory devoted to shared libraries. „ Win95/98 uses a shared lib scheme known as Dynamic Linked Library (DLL)