WPF

public class MyData : INotifyPropertyChanged
{
   private String m_LowChRX;
   private String m_LowChTX;

   public String LowChRX
   {
       get { return m_LowChRX; }
       set { m_LowChRX = value; OnPropertyChanged("LowChRX"); }
   }
   public String LowChTX
   {
       get { return m_LowChTX; }
       set { m_LowChTX = value; OnPropertyChanged("LowChTX"); }
   }...

MyData myData1;

binding = new Binding("LowChRX");
binding.Source = myData1;
myBox.tbLowChRX.SetBinding(TextBox.TextProperty, binding);

myBox.CustomControl.SetBinding(Property, binding)

<ListBox ItemsSource="{Binding Values[KeyToGetItems]}" />

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*" />
        <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    
    <ListBox Name="lstValues" ItemsSource="{Binding Values}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Key}" />
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

    <StackPanel Grid.Row="1" ItemsSource="{Binding SelectedItem.Value, ElementName=lstValues}">
        <!-- other controls here -->            
    </StackPanel>
</Grid>

<Style TargetType="{x:Type Border}" x:Key="MyBorder">
        <Setter Property="Background" Value="#E7E3ED" />
        <Setter Property="BorderBrush" Value="Black" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="CornerRadius" Value="8,8,8,8" />
    </Style>

<Border Margin="0,31,0,0" Width="222" Height="32" HorizontalAlignment="Left"
           VerticalAlignment="Top" Style="{DynamicResource UDPBorder}">
    <TextBlock>Hello</TextBlock>
</Border>

<StackPanel>
  <Border Style="{StaticResource OrangeBorderStyle}">
    <TextBlock>Hello</TextBlock>
  </Border>
  <Border Style="{StaticResource OrangeBorderStyle}">
    <Grid>
      <!-- your controls here -->
    </Grid>
  </Border>
</StackPanel>