NAME
	  glXQueryExtension - indicate whether the GLX extension is
	  supported


     C SPECIFICATION
	  Bool glXQueryExtension( Display *dpy,
				  int *errorBase,
				  int *eventBase )


     PARAMETERS
	  dpy	     Specifies the connection to the X server.

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

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

     DESCRIPTION
	  glXQueryExtension returns True if the	X server of connection
	  dpy supports the GLX extension, False	otherwise.  If True is
	  returned, then errorBase and eventBase return	the error base
	  and event base of the	GLX extension.	Otherwise, errorBase
	  and eventBase	are unchanged.

	  errorBase and	eventBase do not return	values if they are
	  specified as NULL.

     NOTES
	  eventBase is included	for future extensions.	GLX does not
	  currently define any events.

     SEE ALSO
	  glXQueryVersion