Update Z Index
<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'> <Grid x:Name="LayoutRoot" Background="White"> <Canvas x:Name="myCanvas"> <Canvas Canvas.ZIndex="2" Width="60" Height="60" Background="LightGray"/> <Canvas Canvas.ZIndex="1" Width="60" Height="60" Canvas.Left="20" Canvas.Top="20" Background="Gray" /> <Canvas x:Name="myElement" Width="60" Height="60" Canvas.Left="40" Canvas.Top="40" Background="Black"/> </Canvas> </Grid> </UserControl> //File: Page.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Net; 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; using System.Windows.Browser; namespace SilverlightApplication3 { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); HtmlPage.RegisterScriptableObject("bridge", this); } [ScriptableMember] public void UpdateZIndex() { int newZIndex = Canvas.GetZIndex(myElement) + 10; Canvas.SetZIndex(myElement, newZIndex); } } }