XSelectInput(XS) X Version 11 (Release 5) 6 January 1993 XSelectInput(XS) 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. eventmask 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 donotpropagate 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 restric- tions: + 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. + Only one client at a time can select CirculateRequest, Config- ureRequest, or MapRequest events, which are associated with the event mask SubstructureRedirectMask. + Only one client at a time can select a ResizeRequest event, which is associated with the event mask ResizeRedirectMask. + Only one client at a time can select a ButtonPress event, which is associated with the event mask ButtonPressMask. 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 Win- dow. See also Xlib - C Language X Interface