Anyone used InetIsOffline API successfully before?

[Lothar Haensler]

according to MSDN the InetIsOffline function should reside in shell32.dll, version 4.00.
I do own version 4.00 of shell32.dll on WinNT4.0.
Still, I get a "can't find DLL entry point..." if I try to use it in my VB program and DUMPBIN/EXPORTS doesn't list the function.

What am I doing wrong?
(I do know Internetgetconnectedstate API...)