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LPT port access from Visual C++

Posted on 1998-11-24
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Last Modified: 2013-11-15
Using API calls and the standard LPT.VXD Windows driver, how can I determine the condition of the parallel port's status lines?  I am using CreateFile("LPT1...") and WriteFile to send characters out to a device, but I need to know the value of the printer status register.  I want to use API calls so this would work in 95 or NT.  Serial ports have calls like GetCommModemStatus, but is there none for the parallel port?
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Question by:walseth
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by:jkr
ID: 1178587
What about trying 'OpenPrinter()', 'ReadPrinter()' ... API calls? There's also an article that describes the handling of raw data thorugh printer ports (MS KB Article ID Q138594)
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ivi earned 200 total points
ID: 1178588
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by:walseth
ID: 1178589
This is a good answer.  In fact, I had already decided to go with Mr. Victor Ishikev's virtual device driver (TVicPort), and received my registered version this morning.  This driver allows me to access the LPT port registers directly--I have tested it on several machines already.

However, the original question really remains unanswered--that is, how to use existing API calls to do this stuff.  Still, I do not reject the answer because I now think that is IMPOSSIBLE.

Thanks to anyone else who gave this some thought.      
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