GroupBox Control Sample

Inheritance of System.Windows.Controls.GroupBox :

System.Object
 System.Windows.Threading.DispatcherObject
  System.Windows.DependencyObject
   System.Windows.Media.Visual
    System.Windows.UIElement
     System.Windows.FrameworkElement
      System.Windows.Controls.Control
       System.Windows.Controls.ContentControl
        System.Windows.Controls.HeaderedContentControl
         System.Windows.Controls.GroupBox

GroupBox Control with 3 Buttons.

<Page xmlns  ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      Width="120">
 <GroupBox Header="Group of Buttons" BorderThickness="3" Height="120">
  <StackPanel VerticalAlignment="Center">
   <Button Width="80" Content="Button 1"/>
   <Separator Visibility="Hidden"/>
   <Button Width="80" Content="Button 2"/>
   <Separator Visibility="Hidden"/>
   <Button Width="80" Content="Button 3"/>
  </StackPanel>
 </GroupBox>
</Page>

When you are in the Internet Explorer run GroupBox.xaml and click its items !