I have a laptop which has no Parallel port so I bought a USB to
parallel port convertor. When I write to the virtual parallel port it
doesn't respond (I can get a real port to work on a normal pc). How to
write to this virtual port?
I tried all the addresses. Do I need the driver - it just uses a .sys
file and I normally work with dlls.All i am doing is writing a byte to
the port - not asking much!

Hardy

Hi,

You cannot access it directly -- this is a virtal port, and has no IO
addresses like a conventional hardware port.  Your only option, I think:

http://support.microsoft.com/kb/138594/ or
http://support.microsoft.com/kb/96795

These do not show how to READ parallel port pins, though.

So, you may want to explore some other avenue.  Saelig (www.saelig.com)
sells USB parallel IO devices that may be more satisfactory.

Dick

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