private void SetControlStates()
{
lblYear.Visible = numYears.Visible = _maxDuration >= MaxDuration.Years;
lblMonth.Visible = numMonths.Visible = _maxDuration >= MaxDuration.Months;
lblDay.Visible = numDays.Visible = _maxDuration >= MaxDuration.Days;
lblHour.Visible = numHours.Visible = _maxDuration >= MaxDuration.Hours;
lblMinute.Visible = numMinutes.Visible = _maxDuration >= MaxDuration.Minutes;
}