XSelectInput man page

XSelectInput — select input events

Syntax

int XSelectInput(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 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.

Diagnostics

BadWindow

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

See Also

Xlib - C Language X Interface

Referenced By

XDGA(3).

libX11 1.6.4 X Version 11 XLIB FUNCTIONS