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Autodocs
 Devices:
 printer.device
  --background--
  CMD_FLUSH
  CMD_INVALID
  CMD_RESET
  CMD_START
  CMD_STOP
  CMD_WRITE
  CallErrHook
  PBothReady
  PQuery
  PRD_DUMPRPORT
  PRD_DUMPRPORTTAGS
  PRD_EDITPREFS
  PRD_PRTCOMMAND
  PRD_QUERY
  PRD_RAWWRITE
  PRD_READPREFS
  PRD_SETERRHOOK
  PRD_WRITEPREFS
  PRead
  PWrite
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GuruMeditation
Docs » Autodocs » printer.device » PQuery

NAME

	PQuery - read number of chars in input buffer

SYNOPSIS

	error = (*PrinterData->pd_PQuery)(*length);
D0
LONG PRead(LONG *);

FUNCTION

   	PQuery reads the number of data in the input buffer which can be
read from the printer port. The variable length points to is set
to the number of readable chars.

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