Parallel port under Windows 7

Did somebody try writing values to parallel port under Windows 7? So far I am
unable to do it. Stuff that worked on XP doesn't under Win7.

CreateFile("LPT3"...) succeeds but all subsequent commands (GetCommState,
WriteFile) fail. I stopped spooling and followed recommendations from
http://support.microsoft.com/kb/823179/en-us. Didn't help.

InpOut32.dll does not work on 64 bit version (which is expected), but even
32 bit version works on some computers and doesn't on the others.
Specifically, it works on the PC with LPT port on a separate I/O card
(appears on Device Manager as LPT3) and does not work on the PC with native
LPT1 port.

Does anyone have experience with writing values to LPT port under Windows 7?