Function            isPRINTavail - is PRINT.COM installed

  Syntax              int isPRINTavail(void);

  Prototype in        printhk.h

  Remarks             detects if PRINT.COM is installed.

  Return value        returns PRINT_ERROR if DOS 3.1 or greater is not
                      being used, otherwise returns PRINT_OK, PRINT_NOOK
                      or PRINT_INSTALLED, depending on the current
                      status.

  Note                requires DOS 3.1 or greater.

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