+ wxCHECK_RET( day > 0 && day < 32, "invalid day" );
+
+ int mask = 1 << (day - 1);
+ if ( mark )
+ m_marks |= mask;
+ else
+ m_marks &= ~mask;
+
+ // calling Refresh() here is not enough to change the day appearance
+ UpdateMarks();
+}
+
+void wxCalendarCtrl::SetHoliday(size_t day)
+{
+ wxCHECK_RET( day > 0 && day < 32, "invalid day" );
+
+ m_holidays |= 1 << (day - 1);
+}
+
+void wxCalendarCtrl::UpdateMarks()
+{
+ // we show only one full month but there can be some days from the month
+ // before it and from the one after it so days from 3 different months can
+ // be partially shown
+ MONTHDAYSTATE states[3] = { 0 };
+ const int nMonths = MonthCal_GetMonthRange(GetHwnd(), GMR_DAYSTATE, NULL);
+
+ // although in principle the calendar might not show any days from the
+ // preceding months, it seems like it always does, consider e.g. Feb 2010
+ // which starts on Monday and ends on Sunday and so could fit on 4 lines
+ // without showing any subsequent months -- the standard control still
+ // shows it on 6 lines and the number of visible months is still 3
+ wxCHECK_RET( nMonths == (int)WXSIZEOF(states), "unexpected months range" );
+
+ // the fully visible month is the one in the middle
+ states[1] = m_marks | m_holidays;
+
+ if ( !MonthCal_SetDayState(GetHwnd(), nMonths, states) )
+ {
+ wxLogLastError(_T("MonthCal_SetDayState"));
+ }
+}
+
+void wxCalendarCtrl::UpdateFirstDayOfWeek()
+{
+ MonthCal_SetFirstDayOfWeek(GetHwnd(), HasFlag(wxCAL_MONDAY_FIRST) ? 0 : 6);