Adds the specified function to the list of functions to be called when a key event occurs. The data element will be passed to the AtkKeySnoopFunc (listener) as the func_data param, on notification.
the listener to notify
a gpointer that points to a block of data that should be sent to the registered listeners, along with the event notification, when it occurs.
added event listener id, or 0 on failure.
Adds the specified function to the list of functions to be called when a key event occurs. The data element will be passed to the AtkKeySnoopFunc (listener) as the func_data param, on notification.