FindFirstUrlCacheGroup and FindNextUrlCacheGroup are missing

OS: Windows XP Pro SP1
gcc: 3.2.3 (mingw special 20030504-1)
ld: 2.13.90 20030111
mingw: MinGW-3.1.0-1.exe
build env: ran mingw32-make under Windows cmd.exe
w32api: __W32API_VERSION 2.5

The functions FindFirstUrlCacheGroup,
FindNextUrlCacheGroup and their associated constants
are missing from MinGW's wininet.h.

MSDN Help page for FindFirstUrlCacheGroup:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/findfirsturlcachegroup.asp

Attached is source code for a program that uses the
missing functions and exposes the problem. This
program, named CacheSpy, dumps info about the Internet
Explorer cache to the console.