|Microsoft Internet Security and Acceleration Server 2000|
The GetFilterVersion function is the first entry-point function called by the ISA Web proxy service on your Web (ISAPI) filter and must be present for the filter to work properly. Its declaration is:
BOOL WINAPI GetFilterVersion( PHTTP_FILTER_VERSION pVer );
If this function returns TRUE, the filter will remain loaded. If the function returns FALSE, the filter will not receive any event notifications.
Note It is important to register only for those notifications that are necessary for your filter's purposes. Registering for additional notifications will reduce performance.