WPF

Label.Content = "my string";

<Label Content="my string" />

<Controls:DatePicker Grid.Column="1" Grid.Row="6" SelectedDate="{Binding BirthDate}" ViewModels:EmployeeViewModel.DatePickerGotFocus="{Binding}">
            <Controls:DatePicker.CalendarStyle>
              <Style TargetType="Controls:Calendar">
                <Setter Property="Template">
                  <Setter.Value>
                    <ControlTemplate TargetType="Controls:Calendar">
                      <StackPanel HorizontalAlignment="Center" x:Name="Root">
                        <Controls:Calendar x:Name="Calendar" ViewModels:EmployeeViewModel.OnCalenderLoaded="{Binding}" SelectedDate="{Binding BirthDate}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
                          <Controls:Calendar.CalendarDayButtonStyle>
                            <Style>
                              <Setter Property="Button.Height" Value="50"></Setter>
                              <Setter Property="Button.Width" Value="50"></Setter>
                              <Setter Property="Button.FontSize" Value="20"></Setter>
                            </Style>
                          </Controls:Calendar.CalendarDayButtonStyle>
                          <Controls:Calendar.CalendarButtonStyle>
                            <Style>
                              <Setter Property="Button.Height" Value="50"></Setter>
                              <Setter Property="Button.Width" Value="50"></Setter>
                              <Setter Property="Button.FontSize" Value="20"></Setter>
                            </Style>
                          </Controls:Calendar.CalendarButtonStyle>
                        </Controls:Calendar>
                      </StackPanel>
                    </ControlTemplate>
                  </Setter.Value>
                </Setter>
              </Style>
            </Controls:DatePicker.CalendarStyle>
          </Controls:DatePicker>

private Calendar _calender;
    private DatePicker _datePicker;

    public static object GetDatePickerGotFocus(DependencyObject obj)
    {
      return (object)obj.GetValue(DatePickerGotFocusProperty);
    }

    public static void SetDatePickerGotFocus(DependencyObject obj, object value)
    {
      obj.SetValue(DatePickerGotFocusProperty, value);
    }

    // Using a DependencyProperty as the backing store for DatePickerGotFocus.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty DatePickerGotFocusProperty =
        DependencyProperty.RegisterAttached("DatePickerGotFocus", typeof(object), typeof(EmployeeViewModel), new UIPropertyMetadata(OnDatePickerGotFocus));

    private static void OnDatePickerGotFocus(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
      DatePicker datePicker = d as DatePicker; //d.GetValue(FocusEditProperty) as TextBox;
      EmployeeViewModel model = e.NewValue as EmployeeViewModel;
      if (datePicker != null && model != null)
      {
        model._datePicker = datePicker;
      }
    }


    public static object GetOnCalenderLoaded(DependencyObject obj)
    {
      return (object)obj.GetValue(OnCalenderLoadedProperty);
    }

    public static void SetOnCalenderLoaded(DependencyObject obj, object value)
    {
      obj.SetValue(OnCalenderLoadedProperty, value);
    }

    // Using a DependencyProperty as the backing store for OnCalenderLoaded.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty OnCalenderLoadedProperty =
        DependencyProperty.RegisterAttached("OnCalenderLoaded", typeof(object), typeof(EmployeeViewModel), new UIPropertyMetadata(OnCalenderLoaded));

    private static void OnCalenderLoaded(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
      Calendar calendar = d as Calendar; //d.GetValue(FocusEditProperty) as TextBox;
      EmployeeViewModel model = e.NewValue as EmployeeViewModel;
      if (calendar != null && model != null)
      {
        model._calender = calendar;
      }
    }

public DateTime BirthDate
   {
     get { return _birthDate; }
     set
     {
       _birthDate = value;
       OnPropertyChanged("BirthDate");
       if (_calender != null)
       {
         _calender.Visibility = Visibility.Hidden;
         _datePicker.GotFocus += new RoutedEventHandler(_datePicker_GotFocus);
       }
     }
   }

   private void _datePicker_GotFocus(object sender, RoutedEventArgs e)
   {
     _calender.Visibility = Visibility.Visible;
     etc..

<tool:DatePicker Grid.Column="1" Grid.Row="8" SelectedDate="{Binding BirthDate}" ViewModels:PatronViewModel.DatePickerGotFocus="{Binding}" Height="34" FontSize="18">
           <tool:DatePicker.LayoutTransform>
              <ScaleTransform ScaleY="1.5" ScaleX="1.5"></ScaleTransform>
            </tool:DatePicker.LayoutTransform>
            <tool:DatePicker.CalendarStyle>
              <Style TargetType="tool:Calendar">
                <Setter Property="Template">
                  <Setter.Value>
                    <ControlTemplate TargetType="tool:Calendar">
                      <StackPanel HorizontalAlignment="Center" x:Name="Root">
                        <tool:Calendar x:Name="Calendar" ViewModels:PatronViewModel.OnCalenderLoaded="{Binding}" SelectedDate="{Binding BirthDate}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
                          <tool:Calendar.LayoutTransform>
                            <ScaleTransform ScaleX="2" ScaleY="2"></ScaleTransform>
                          </tool:Calendar.LayoutTransform>
                        </tool:Calendar>
                      </StackPanel>
                    </ControlTemplate>
                  </Setter.Value>
                </Setter>
              </Style>
            </tool:DatePicker.CalendarStyle>
          </tool:DatePicker>

<Popup Name="Part_CalendarPopup" 
        Margin="0,22,-22,-12"
        HorizontalAlignment="Right" 
        PlacementTarget="{Binding ElementName=Part_CalendarButton}" StaysOpen="False">
        <Grid Name="Part_CalendarGrid" Background="White">
          <cal:Calendar
             SelectedDate="{Binding SelectedDate, Mode=TwoWay}"  <!-- the holy line -->
             Height="160" Width="160" 
             FooterVisibility="Collapsed" WeekColumnVisibility="Collapsed"   
             FontSize="9"/>
            </Grid>
         </Popup>

SR81 wrote:

KeyDown="cmbPortsFrom_KeyDown"