The version number of ISAPI used by the Web (ISAPI) filter. The
version used by your filter can be set by using the
HTTP_FILTER_REVISION definition from the httpfilt.h header file in
the Windows 2000 SDK.
Points to a null-terminated string that provides a short
description of the Web (ISAPI) filter.
Contains flags that indicate for which notification-event types
the filter should be notified, and what the filter's priority is.
See Event Notifications for a
list of priority flag values.