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From: Gregory K on 2 Jun 2010 10:19
My program (C++) needs to write an integer value to the printer port. I used
TVicPort driver that was developed just for that purpose
(http://www.entechtaiwan.com/dev/port/index.shtm). Unfortunately it does not
work under Windows 7. Can somebody suggest software that would allow my
program to write an integer to a parallel port (LPT1, LPT2 etc)?
Gregory
From: Maxim S. Shatskih on 2 Jun 2010 11:27
Open \\.\NONSPOOLED_LPT1 and write there.

--
Maxim S. Shatskih
Windows DDK MVP
maxim(a)storagecraft.com
http://www.storagecraft.com

"Gregory K" <GregoryK(a)discussions.microsoft.com> wrote in message news:5E396A77-5659-4F0B-B52D-87260B1672F4(a)microsoft.com...
> My program (C++) needs to write an integer value to the printer port. I used
> TVicPort driver that was developed just for that purpose
> (http://www.entechtaiwan.com/dev/port/index.shtm). Unfortunately it does not
> work under Windows 7. Can somebody suggest software that would allow my
> program to write an integer to a parallel port (LPT1, LPT2 etc)?
> Gregory
From: Gregory K on 2 Jun 2010 14:50
> Open \\.\NONSPOOLED_LPT1 and write there.

I tried it. Does not work.

HANDLE h = CreateFile("NONSPOOLED_LPT1", GENERIC_WRITE, 0, 0, OPEN_EXISTING,
0, 0);
returns invalid handle when I use "NONSPOOLED_LPT1", "\\.\NONSPOOLED_LPT1",
"\\\\.\\NONSPOOLED_LPT1".

if I use "LPT1", it creates a handle successfully but WriteFile returns an
error.
I reproduced the same problem under XP, so I must be doing something wrong.
Can you help?
Gregory

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