IIS ISAPI Filters

This section provides reference topics for developing ISAPI filter DLLs.

ISAPI filters are DLL files that can be used to modify and enhance the functionality provided by IIS. ISAPI filters always run on an IIS server, filtering every request until they find one they need to process. Functions and structures are declared in httpfilt.h.

This section includes the following topics:

• ISAPI Filter Entry-Point Functions

• ISAPI Filter Callback Functions

• ISAPI Filter Structures

• ISAPI Filter Event Notifications