<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Ventana WPF" Height="200" Width="300" Name="VentanaWPF">
  <Grid>
    <Grid.ColumnDefinitions>
      <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
      <RowDefinition />
      <RowDefinition />
    </Grid.RowDefinitions>

    <Label Grid.Row="0" Content="etiqueta" Name="etSaludo"
           HorizontalContentAlignment="Center"
           VerticalContentAlignment="Center"  Width="120" Height="30"
           FontStyle="Normal" FontSize="14" />
    <Button Grid.Row="1" Content="Haga _clic aquí" Name="btSaludo"
            Height="23" Width="120" ToolTip="Botón de pulsación"
            Click="btSaludo_Click" />
  </Grid>
</Window>
