hpux man page for xchecktypea

XCheckTypedEvent()														XCheckTypedEvent()

Name
  XCheckTypedEvent - return the next event in queue that matches event type; don't wait.

Synopsis
  Bool XCheckTypedEvent(display, event_type, event_return)
	Display *display;
	int event_type;
	XEvent *event_return;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  event_type
	    Specifies the event type to be compared.

  event_return
	    Returns a copy of the matched event structure.

Returns
  True if a matching event is found, else False.

Description
  XCheckTypedEvent()  searches	first  the event queue, then the events available on the server connection, for the specified event_type.  If
  there is a match, it returns the associated event structure.	Events searched  but  not  matched  are  not  discarded.   XCheckTypedEvent()
  returns True if the event is found.  If the event is not found, XCheckTypedEvent() flushes the request buffer and returns False.

  This	command  is similar to XCheckMaskEvent(), but it searches through the queue and any events available on the server connection instead
  of inspecting only the last item on the queue.  It also matches only a single event type instead of multiple event types as specified by  a
  mask.

  For more information, see Volume One, Chapter 8, Events.

See Also
  XQLength(),  XAllowEvents(), XCheckIfEvent(), XCheckMaskEvent(), XCheckTypedWindowEvent(), XCheckWindowEvent(), XEventsQueued(), XGetInput-
  Focus(), XGetMotionEvents(), XIfEvent(), XMaskEvent(), XNextEvent(), XPeekEvent(), XPeekIfEvent(), XPending(), XPutBackEvent(),  XSelectIn-
  put(), XSendEvent(), XSetInputFocus(), XSynchronize(), XWindowEvent().

Xlib - Input Handling														XCheckTypedEvent()