<StackPanel>
         <WrapPanel>
             <Label Content="_Texto" Target="{Binding ElementName=TextBox1}" />
             <TextBox Name="TextBox1" TextWrapping="Wrap" TabIndex="0" Margin="2" Width="230" ></TextBox>
         </WrapPanel>
         <Button Content="_Boton" Height="23" Name="button1" Width="75" TabIndex="1" IsDefault="True" />
</StackPanel>