<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="Navigate" Title="Navigate" Height="130" Width="500" ResizeMode="NoResize" ShowInTaskbar="False" WindowStartupLocation="CenterOwner" FocusManager.FocusedElement="{Binding ElementName=Url}"> <Grid> <Grid.Resources> <Style TargetType="{x:Type Grid}"> <Setter Property="Margin" Value="10" /> </Style> <Style TargetType="{x:Type Label}"> <Setter Property="Margin" Value="30,0,5,5" /> <Setter Property="Padding" Value="0,0,0,5" /> </Style> <Style TargetType="{x:Type TextBox}"> <Setter Property="Margin" Value="30,0,10,10" /> <Setter Property="AutoWordSelection" Value="True" /> </Style> <Style TargetType="{x:Type StackPanel}"> <Setter Property="Orientation" Value="Horizontal" /> <Setter Property="HorizontalAlignment" Value="Right" /> </Style> <Style TargetType="{x:Type Button}"> <Setter Property="Width" Value="70" /> <Setter Property="Height" Value="25" /> <Setter Property="Margin" Value="5,0,0,0" /> </Style> </Grid.Resources> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="Auto" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <!-- Label and URL --> <Label Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="0">Type an Internet address and My Own WPF Browser will open it for you </Label> <TextBox Name="Url" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1"> </TextBox> <!-- Accept or Cancel--> <StackPanel Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="2"> <Button Name="okButton" Click="okButton_Click" IsDefault="True">OK</Button> <Button Name="cancelButton" IsCancel="True">Cancel</Button> </StackPanel> </Grid > </Window>I will apreciate your help