void SetDefaultFocus()
{
if (m_calculator != null && m_calculator.Visibility == Visibility.Visible)
{
m_calculator.SetDefaultFocus();
}
// UNO TODO
//if (m_dateCalculator != null && m_dateCalculator.Visibility == Visibility.Visible)
//{
// m_dateCalculator.SetDefaultFocus();
//}
//if (m_converter != null && m_converter.Visibility == Visibility.Visible)
//{
// m_converter.SetDefaultFocus();
//}
}