BWeekday
status_t GetStartOfWeek(BWeekday* weekday) const;
BWeekday StartOfWeek() const;
void SetStartOfWeek(BWeekday startOfWeek);
BDateFormat::GetStartOfWeek(BWeekday* startOfWeek) const
BWeekday
return BWeekday(fStartOfWeek);
BCalendarView::SetStartOfWeek(BWeekday startOfWeek)
BDateFormat().GetStartOfWeek((BWeekday*)&fStartOfWeek);