Function:   PrintFile()

               This function returns the name of a file in the
               queue. Use PrintCount() to get the number of
               files. This function does NOT actually print a
               file! Use Submitfile() for that.

               A call to this function suspends the PRINT
               operation, see PrintResume() to restart the
               Printing.

   Syntax:     PrintFile(<nFileNr>)

   Arguments:  <nFileNr> is the number of the file in the print
               queue.

   Returns:    A filename as a string.

   Usage:      See PrintCount().