How to Use the TextBox Control

<UserControl x:Class="TextBoxPlus.Page"
xmlns="http://schemas.microsoft.com/client/2007"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="300">
<Canvas>
<TextBlock x:Name="userNameLabel" Canvas.Left="0" Canvas.Top="52" Text="User Name:" FontFamily="Arial" />
<TextBlock x:Name="passwordLabel" Canvas.Left="0" Canvas.Top="82" Text="Password:" FontFamily="Arial" />
<TextBox x:Name="userName" Canvas.Top="50" Canvas.Left="80" Width="150" MaxLength="20" TabIndex="0" />
<PasswordBox x:Name="password" Canvas.Top="80" Canvas.Left="80" Width="150" TabIndex="1" />
</Canvas>
</UserControl>