hpux man page for xmaskevent

XMaskEvent()															      XMaskEvent()

Name
  XMaskEvent - remove the next event that matches mask.

Synopsis
  XMaskEvent(display, event_mask, event_return)
	Display *display;
	long event_mask;
	XEvent *event_return;

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

  event_mask
	    Specifies the event mask.  See XSelectInput() for a complete list of the event mask symbols that can be ORed together.

  event_return
	    Returns the event removed from the event queue.

Description
  XMaskEvent() removes the next event in the queue which matches the passed mask.  The event is copied into an XEvent supplied by the caller.
  Other events in the queue are not discarded.	If no such event has been queued, XMaskEvent() flushes the request buffer and waits until one
  is received.	Use XCheckMaskEvent() if you do not wish to wait.

  XMaskEvent()	cannot	return	ClientMessage, MappingNotify, SelectionClear, SelectionNotify, or SelectionRequest events because these event
  types are by definition unmaskable.

See Also
  XAllowEvents(), XCheckIfEvent(), XCheckMaskEvent(),  XCheckTypedEvent(),  XCheckTypedWindowEvent(),  XCheckWindowEvent(),  XEventsQueued(),
  XGetInputFocus(), XGetMotionEvents(), XIfEvent(), XNextEvent(), XPeekEvent(), XPeekIfEvent(), XPending(), XPutBackEvent(), XQLength(), XSe-
  lectInput(), XSendEvent(), XSetInputFocus(), XSynchronize(), XWindowEvent().

Xlib - Input Handling														      XMaskEvent()