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dfIsPrn()
Replaces Clipper's ISPRINTER()
------------------------------------------------------------------------------
Syntax:

     dfIsPrn( <nPrinter> ) --> lStatus

Parameters:

     <nPrinter> number of the printer to test
     +---------------------+
     |#|     Printer       |
     |-+-------------------|
     |1|       LPT1        |
     |2|       LPT2        |
     |3|       LPT3        |
     +---------------------+

Returns:

     <lStatus> If .T. the printer is ready.

Description:

     Returns a printer's status.

Example:

     // Printer test
     ? dfIsPrn()        //  .T.
     ? dfIsPrn( 1 )     //  .T.
     ? dfIsPrn( 2 )     //  .T.
     ? dfIsPrn( 3 )     //  .F.

See also:

     dfPrnChk()