) A programming interface on Internet Information Services (IIS), Microsoft's Web server. Using ISAPI function calls, Web pages can invoke programs that are written as DLLs on the server, typically to access data in a database. IIS comes with a DLL that allows embedded queries to access ODBC-compliant databases. ISAPI is an alternative to using CGI scripts on Microsoft Web servers. The counterpart to ISAPI on the client side is WinInet. See WinInet
This illustration shows the various methods used to deploy server-side processing. ISAPI applications are only one technique used in Web servers.