int *errorb,
                               int *event )

PARAMETERS
       dpy     Specifies the connection to the X server.

       errorb  Returns the base error code of the GLX server extension.

       event   Returns the base event code of the GLX server extension.

DESCRIPTION
       glXQueryExtension  returns  True  if the X server of connection dpy sup‐
       ports the GLX extension, False otherwise.  If True is returned, then er‐
       rorb  and  event  return the error base and event base of the GLX exten‐
       sion.  These values should be added to the constant error and event val‐
       ues  to  determine  the actual event or error values.  Otherwise, errorb
       and event are unchanged.

       errorb and event do not return values if they are specified as NULL.

SEE ALSO
       glXQueryVersion

                                                          GLXQUERYEXTENSION(3G)