TGtkCalendarDisplayOptions

type TGtkCalendarDisplayOptions = (

  GTK_CALENDAR_SHOW_HEADING = 1 shl 0,

  GTK_CALENDAR_SHOW_DAY_NAMES = 1 shl 1,

  GTK_CALENDAR_NO_MONTH_CHANGE = 1 shl 2,

  GTK_CALENDAR_SHOW_WEEK_NUMBERS = 1 shl 3,

  GTK_CALENDAR_WEEK_START_MONDAY = 1 shl 4

);