private void UpdateFocusState()
{
if (_dateTimePicker.Focused)
{
_displayBox.BackColor = SystemColors.Highlight;
_displayBox.ForeColor = SystemColors.HighlightText;
}
else
{
_displayBox.BackColor = _dateTimePicker.BackColor;
_displayBox.ForeColor = _dateTimePicker.BackColor;
}
_displayText.BackColor = _displayBox.BackColor;
_displayText.ForeColor = _displayBox.ForeColor;
}