A: All client request header fields are accessible through GetServerVariable(): value for lpszVariableName should be header's name prefixed by "HTTP_", i.e. to get "Cookie: " value pass "HTTP_COOKIE".
Within this 15 Seconds' issue there is an example of a redirecting ISAPI filter written in MSVC 4.2, that redirects files not found to the default of the closest root. This issue includes source code and a explanation of implementation. [Read This Article][Top]