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Night Owl CD-ROM (NOPV9) (Night Owl Publisher) (1993).ISO
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PRINTERS.DOC
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┌───────────────────────────────┐
│ SuperLib 2.50 │
│ For Clipper S87 and 5.01 │
│ ------------------------- │
│ copyright 1990 │
│ Garry A Prefontaine │
└───────────────────────────────┘
Printer Issues
--------------
This is how printing is handled by the library functions. You need
not follow this method.
INITSUP() creates a global variable called _SUPERPRN, which contains
the printer port as a string with the default as "LPT1"
INITSUP() also creates _CHECKPRN and sets it to .t. (_CHECKPRN indicates
whether of not SuperLib should attempt a hardware printer check to
determine printer readiness.)
To change the default printer port, after calling INITSUP(), set _SUPERPRN
to the appropriate port.
Valid values are "LPT1", "LPT2", "LPT3", "COM1","COM2".
At print time, LPT1-3 are checked for readiness via the P_READY() function.
COM ports are not checked for readiness. However, if _CHECKPRN has been set
to .f., no check for readiness is done. (do this on a network where the
printers are redirected)
If the port is not ready, the user is given
the option to: Try Again
Ignore the Warning
Select a Different Printer Port
Abort the print request
If Abort is selected, P_READY() returns false.