Function            PRINTadd - add a file to the print queue

  Syntax              int PRINTadd(char *filename, int level);

  Prototype in        printhk.h

  Remarks             adds a file to the print queue. The filename may
                      NOT have wildcards. The priority level is
                      determined by level.

  Return value        returns zero if no error occurred, otherwise
                      returns the error code. See printhk.h for a full
                      list of the error return codes.

  Note                requires DOS 3.1 or greater.

  See also            isPRINTavail(), PRINThold(), PRINTpurge(),
                      PRINTremove(), PRINTresume()