XMapEvent, XMappingEvent - MapNotify and MappingNotify event structures
The structure for MapNotify events contains:
typedef struct {
int type; MapNotify
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 event;
Window window;
Bool override_redirect; boolean, is override set...
} XMapEvent;