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


display Specifies the connection to the X server.
w Specifies the window whose events you are interested in.
event_mask Specifies the event mask.


The XSelectInput() 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:

The server reports the event to all interested clients.

XSelectInput() can generate a BadWindow error.


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

See also

"Selecting Events".
Christophe Tronche, ch@tronche.com