XCirculateRequestEvent - CirculateRequest event structure
The structure for CirculateRequest events contains:
typedef struct {
int type; CirculateRequest
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 parent;
Window window;
int place; PlaceOnTop, PlaceOnBottom
} XCirculateRequestEvent;