XpQueryExtension(3Xp)    XPRINT FUNCTIONS   XpQueryExtension(3Xp)



NAME
       XpQueryExtension  - Queries an X Server to determine if it
       supports the X Print Service Extension, and  if  it  does,
       what the offsets are for associated events and errors.

SYNOPSIS
             cc [ flag... ] file... -lXp [ library... ]
             #include 

       Bool   XpQueryExtension   (   display,   event_base_return
       error_base_return )
             Display *display;
             int *event_base_return;
             int *error_base_return;

ARGUMENTS
       display
              Specifies  a  pointer  to  the  Display  structure;
              returned from XOpenDisplay.

       event_base_return
              The base value for X Print Service Extension events

       error_base_return
              The  base  value  for  X  Print  Service  Extension
              errors.

DESCRIPTION
       XpQueryExtension  determines if the X Print Service Exten-
       sion is present. It returns True if the extension is  sup-
       ported,  otherwise False. If the extension is present, the
       base values for events and errors are returned, and can be
       used to decode incoming event and error values.

       The  X Print Service Extension is initialized on the first
       call to any X Print Service function; there is no need  to
       explicitly initialize the X Print Service Extension.



X Version 11               libXp 1.0.0      XpQueryExtension(3Xp)