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typedef struct { int type; unsigned long serial; /* # of last request processed by server */ Bool send_event; /* true if this came from a SendEvent request */ Display *display; /* Display the event was read from */ Window window; /* unused */ int request; /* one of MappingModifier, MappingKeyboard, MappingPointer */ int first_keycode; /* first keycode */ int count; /* defines range of change w. first_keycode*/ } XMappingEvent;