🚀 go-pugleaf

"Bogdan" <boprea@xnet.ro> wrote in message
news:401be502@newsgroups.borland.com...
>   Does anybody know how to write data to the control register of
> the parallel port  in Windows XP.Using inline assembly can be
> easy( out 379,1 byte of data  ), but Windows XP does not allow
> direct hardware access and if  I use CreateFile("LPT1",.........) and
> then WriteFile(..........)  I cannot write separately to each of the
> 3 registers of the parallel port.

Windows NT and XP prevent direct reading or writing of the
parallel port registers.   You actually need to obtain (and install) a
device driver to achieve this.   Using WriteFile, it is only
possible to write to the data register.

You might try looking at

http://www.lvr.com/parport.htm

You will need to get your hands on a driver that is referred to
in that link as a "inpout DLL".  Such a beast is available
(with source and examples) through

http://www.logix4u.cjb.net/



>  An exact example(in C++) would be very helpful.
>
> Bogdan.
>
>