How to write to USB printer ?

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#13949

From: Richard Yu
Date: Tue, 09 Sep 2003 18:07

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GetDefaultPrinter(PrinterName, &BytesCopied);//ok
    port=PrinterName;

  My code works with Network printer and LPT printer, like this:
  aPrinterName=PrinterName;
    aPSList->Add(" 350 30 moveto ");
    aPSList->Add("("+aPrinterName+")"+" show");
    aPSList->Add("showpage");

    buffer = (char *)malloc(PRINT_BUF_SIZE);

    OpenPrinterA(port, &printer, NULL);
    di.pDocName ="";// wbuf;

    di.pOutputFile = NULL;
    di.pDatatype = TEXT("RAW");
    StartDocPrinter(printer, 1, (LPBYTE)&di);


    for(int i=0;i< aPSList->Count;i++)
    {
        aLine=aPSList->Strings[i]+" \r\n";
        buffer=aLine.c_str();
        WritePrinter(printer, (LPVOID)buffer, aLine.Length(), &written);
    }

    EndDocPrinter(printer);
    ClosePrinter(printer);


when try on USB printer, nothing happened , don't know why ?

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