Popup with TextBlock
<UserControl x:Class='SilverlightApplication3.MainPage' xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' xmlns:d='http://schemas.microsoft.com/expression/blend/2008' xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' mc:Ignorable='d' d:DesignWidth='640' d:DesignHeight='480'> <StackPanel Margin="20" Background="White"> <TextBlock TextWrapping="Wrap" MouseLeftButtonDown="txt_MouseLeftButtonDown" Text="Click here to open the PopUp."></TextBlock> <Popup x:Name="popUp" MaxWidth="200"> <Border Background="Lime" MouseLeftButtonDown="popUp_MouseLeftButtonDown"> <TextBlock Margin="10" Text="This is the PopUp."></TextBlock> </Border> </Popup> </StackPanel> </UserControl> //File: Page.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace SilverlightApplication3 { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); } private void txt_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { popUp.IsOpen = true; } private void popUp_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { popUp.IsOpen = false; } } }