Stream to LPT?

This is a discussion on Stream to LPT? within the C++ Programming forums, part of the General Programming Boards category; How can I make a stream go to a printer on an LPT port? Can it be done? If not, ...

  1. #1
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    Stream to LPT?

    How can I make a stream go to a printer on an LPT port? Can it be done?

    If not, is there any other way of outputting to an LPT?

  2. #2
    _B-L-U-E_ Betazep's Avatar
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    Code:
    #include <iostream>
    #include <fstream>
    #include <stdlib>
    using namespace std ;
    
    int main()
    {
    
            char printer[10] = "LPT1:";
            char character;
    
            
            ofstream prnt (printer);
    
    
            if (prnt.fail()) 
            {
                    cout << "ERROR-Unable to open " << printer << '\n' ;
                    return 1 ;
            }
            system ("cls");
    
            cout << "Type the text you wish to have printed.  You must use "
                 << "\nyour own returns as there is no text wrapping other than "
                 << "\nthat which the printer will do at the end of page. Though, "
                 << "\nthis may lead to words being cut in half.  This simple "
                 << "\nprogram could be made much better utilizing iomanip for text "
                 << "\nformatting, but it shows you the basics of opening a printer "
                 << "\nport. " << endl << endl
                 << "Press a '#' and return when you are ready to print... " << endl
                 << endl << endl;
    
    
            while (character != '#')
            {
                    cin.get(character);
    
                    if(character != '#')
                       prnt.put(character);
            }
            
    
            prnt << '\r' << '\f' ; // return and eject the last page from the printer
    
    
            prnt.close();
    
    return(0);
    
    }
    Last edited by Betazep; 02-04-2002 at 03:07 PM.
    Blue

  3. #3
    It's full of stars adrianxw's Avatar
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    You can get a handle to the port with the CreateFile() API function, look it up in the help with particular reference to the sections dealing with "communication resources". Once you have a handle, you can use any of the normal handle based I/O functions in the API.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

  4. #4
    Banned frenchfry164's Avatar
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    I tried to use _bios_printer(); function before, but the only thing I could do is turn my printer on, using _bios_printer(_Init_Printer,0,0);

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