Extension Reference

There are two types of functions, as well as several different data structures, that make up the ISAPI extension interface.

• Entry-Point Functions: These are functions that your ISAPI extension must provide. These functions are called by IIS.
• Callback Functions: These functions are exposed to your ISAPI extension by IIS. Your extensions can use these functions to perform specialized tasks that require the server, such as writing to the client browser.
• Data Structures: These structures are used to communicate between your ISAPI extension and IIS.

All function declarations and data structures are available in the ISAPI extension header file httpext.h.