Printing via USB port

This is a discussion on Printing via USB port within the A Brief History of Cprogramming.com forums, part of the Community Boards category; How do you send information to a printer connected via the USB port using C. I have tried prn_ptr=fopen("LPT1","wt") and ...

  1. #1
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    Printing via USB port

    How do you send information to a printer connected via the USB port using C. I have tried
    prn_ptr=fopen("LPT1","wt")
    and
    prn_ptr=fopen("PRN","wt")
    but these don't work,( Because they're the parallel port?) , but they don't return a null either.
    This is beginning to drive me crazy so any help would be VERY appreciated!
    Thanks

  2. #2
    Super Moderator VirtualAce's Avatar
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    I'm not positive but I think you can only acces USB ports through Windows and not DOS. This is an assumption on my part, given that you could not do this in Windows 95.

    But, in programming, there is always a way (not to steal a member's slogan). Check www.programmersheaven.com.

  3. #3
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    To access USB in DOS, you'd need to write your own drivers, probably. It is obviously possible, but it may take a lot of work (and a lot of assembly language) to access a USB port in DOS.

    And, you can almost certainly only use it in true DOS, not DOS or emulated DOS running under Windows.

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