ultrix man page for xselectinput

XSelectInput(3X11)						     MIT X11R4							XSelectInput(3X11)

Name
       XSelectInput - select input events

Syntax
       XSelectInput(display, w, event_mask)
	  Display *display;
	  Window w;
	  long event_mask;

Arguments
       display	 Specifies the connection to the X server.

       event_mask
		 Specifies the event mask.

       w	 Specifies the window whose events you are interested in.

Description
       The function requests that the X server report the events associated with the specified event mask.  Initially, X will not report any of
       these events.  Events are reported relative to a window.  If a window is not interested in a device event, it usually propagates to the
       closest ancestor that is interested, unless the do_not_propagate mask prohibits it.

       Setting the event-mask attribute of a window overrides any previous call for the same window but not for other clients.	Multiple clients
       can select for the same events on the same window with the following restrictions:

       o    Multiple clients can select events on the same window because their event masks are disjoint.  When the X server generates an event,
	    it reports it to all interested clients.

       o    Only one client at a time can select or events, which are associated with the event mask

       o    Only one client at a time can select a event, which is associated with the event mask

       o    Only one client at a time can select a event, which is associated with the event mask

       The server reports the event to all interested clients.

       can generate a error.

Diagnostics
       A value for a Window argument does not name a defined Window.

See Also
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

																XSelectInput(3X11)