Win32 Python Open Printer

    printer_dev_path = None
    for port, desc, hwid in win32setupdi.printers(True):
        print "port=%-10s:\n desc=%s\n hwid=(%s)" % (port, desc, hwid)

        if port.find( vid_path ) > 0 and port.find( pid_path ) > 0 :
            printer_dev_path = port

    if printer_dev_path is None :
        print "Printer not attached."
        sys.exit(1)

    print "opening port={0}".format( printer_dev_path )
    file_handle = win32file.CreateFile( printer_dev_path,
                    win32con.GENERIC_READ | win32con.GENERIC_WRITE,
                    0, # exclusive access
                    None, # no security
                    win32con.OPEN_EXISTING,
                    win32con.FILE_ATTRIBUTE_NORMAL | win32con.FILE_FLAG_OVERLAPPED,
                    None)