Public Event MouseLeave As MouseEventHandler

public event MouseEventHandler MouseLeave

<Grid x:Name="LayoutRoot">
  
  <!-- Define some Resources that can be used in other parts of the XAML file. -->
  <Grid.Resources>
  
    <!-- Define a SimpleFillSymbol to use as the initial display of the Graphics on the Map. -->
    <esri:SimpleFillSymbol x:Key="theSimpleFillSymbol" Fill="Beige" BorderBrush="black" 
                           BorderThickness="2" />
  
    <!-- 
    Define a SpatialReference object that has the same WKID as the ArcGISTiledMapServiceLayer in
    the Map.  
     -->
    <esri:SpatialReference x:Key="theSpatialReference" WKID="4326"/>
    
    <!--
    Define a Storyboard that will rotate a custom Path (called myPath) infinately using
    a RenderTransform. This XAML was originally created in a Blend 4 project and copied
    into this Visual Studio project.
    -->
    <Storyboard x:Name="Storyboard1" RepeatBehavior="Forever">
      <DoubleAnimationUsingKeyFrames 
      Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.Rotation)" 
      Storyboard.TargetName="myPath">
        <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.125" Value="45"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.25" Value="90"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.375" Value="135"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="180"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.625" Value="225"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.75" Value="270"/>
        <EasingDoubleKeyFrame KeyTime="0:0:0.875" Value="315"/>
        <EasingDoubleKeyFrame KeyTime="0:0:1.0" Value="360"/>
      </DoubleAnimationUsingKeyFrames>
    </Storyboard>
  </Grid.Resources>
  
  <!-- 
  Add a Map control with an ArcGISTiledMapServiceLayer and a GraphicsLayer. The GraphicsLayer will
  contain one Graphic based upon Polygon geometries (which use the defined SpatialReference) 
  and using the theSimpleFillSymbol as the default symbolization. 
  -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,111,0,0" Name="Map1" 
            VerticalAlignment="Top" Height="318" Width="483" >
    <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" 
             Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"/>
    
    <!-- 
    It is important to provide the GraphicsLayer with an 'ID' Attribute so to be able to access it
    in the code-behind file. 
    -->
    <esri:GraphicsLayer ID="MyGraphicsLayer" >
      
      <esri:GraphicsLayer.Graphics>
        
        <!-- 
        Define a Polygon Graphic using the StaticResources for the Symbol and SpatialReference.
        The Graphic has MouseEnter and MouseLeave Events defined that use code-behind functions.
        -->
        <esri:Graphic Symbol="{StaticResource theSimpleFillSymbol}" 
                      MouseEnter="Graphic_MouseEnter" MouseLeave="Graphic_MouseLeave">
          <esri:Polygon SpatialReference="{StaticResource theSpatialReference}">
            <esri:Polygon.Rings>
              <esri:PointCollection>
                <esri:MapPoint X="-10" Y="10" />
                <esri:MapPoint X="-10" Y="43" />
                <esri:MapPoint X="25" Y="30" />
                <esri:MapPoint X="35" Y="18" />
                <esri:MapPoint X="-10" Y="10" />
              </esri:PointCollection>
            </esri:Polygon.Rings>
          </esri:Polygon>
        </esri:Graphic>
        
      </esri:GraphicsLayer.Graphics>
    </esri:GraphicsLayer>
  </esri:Map>
  
  <!--
  The myPath object was created using Blend 4 and copied into this Visual Studio project.
  It is a circle with an embedded ellise that will rotate infinately because it uses
  StoryBoard animation defined in the Resources section of this XAML. 
  -->
  <Path x:Name="myPath" Fill="Red" Margin="511,207,0,0" Stretch="Fill" Stroke="Black" 
        UseLayoutRounding="False" RenderTransformOrigin="0.5,0.5" HorizontalAlignment="Left" 
        Height="114" VerticalAlignment="Top" Width="114"
        Data="M180.5,38.5 C152.33348,38.5 129.5,67.377632 129.5,103 C129.5,138.62236 152.33348,167.5 180.5,167.5 C208.66652,167.5 231.5,138.62236 231.5,103 C231.5,67.377632 208.66652,38.5 180.5,38.5 z M175,0.5 C271.37369,0.5 349.5,78.626312 349.5,175 C349.5,271.37369 271.37369,349.5 175,349.5 C78.626312,349.5 0.5,271.37369 0.5,175 C0.5,78.626312 78.626312,0.5 175,0.5 z" >
    <Path.RenderTransform>
      <CompositeTransform />
    </Path.RenderTransform>
  </Path>
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="64" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" 
             Width="442" TextWrapping="Wrap" Margin="12,12,0,0" 
             Text="Move the mouse cursor over the Polygon Graphic in the Map to 
                   begin animating the custom Path object. When the mouse cursor 
                   exits the polygon the animation will stop." />
  
</Grid>

private void Graphic_MouseEnter(object sender, System.Windows.Input.MouseEventArgs e)
{
  // This function will obtain the Storyboard1 object from the Resources section of the
  // XAML file. The Storyboard.Begin function invokes the animation of a circle with an
  // embedded ellipse to rotate continuously while the mouse cursor is over the Polygon
  // Graphic object in the Map. The sender input parameter of this function is the 
  // Polygon Graphic.
  
  Storyboard sb = (Storyboard)(LayoutRoot.Resources["Storyboard1"]);
  sb.Begin();
}
            
private void Graphic_MouseLeave(object sender, System.Windows.Input.MouseEventArgs e)
{
  // This function will obtain the Storyboard1 object from the Resources section of the
  // XAML file. The Storyboard.Stop function terminates the animation of a circle with an
  // embedded ellipse that is rotating continuously when the mouse cursor exits the Polygon
  // Graphic object in the Map. The sender input parameter of this function is the 
  // Polygon Graphic.
  
  Storyboard sb = (Storyboard)(LayoutRoot.Resources["Storyboard1"]);
  sb.Stop();
}

Private Sub Graphic_MouseEnter(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseEventArgs)
  
  ' This function will obtain the Storyboard1 object from the Resources section of the
  ' XAML file. The Storyboard.Begin function invokes the animation of a circle with an
  ' embedded ellipse to rotate continuously while the mouse cursor is over the Polygon
  ' Graphic object in the Map. The sender input parameter of this function is the 
  ' Polygon Graphic.
  
  Dim sb As Storyboard = DirectCast(LayoutRoot.Resources("Storyboard1"), Storyboard)
  sb.Begin()
  
End Sub
  
Private Sub Graphic_MouseLeave(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseEventArgs)
  
  ' This function will obtain the Storyboard1 object from the Resources section of the
  ' XAML file. The Storyboard.Stop function terminates the animation of a circle with an
  ' embedded ellipse that is rotating continuously when  the mouse cursor exits the Polygon
  ' Graphic object in the Map. The sender input parameter of this function is the 
  ' Polygon Graphic.
  
  Dim sb As Storyboard = DirectCast(LayoutRoot.Resources("Storyboard1"), Storyboard)
  sb.Stop()
  
End Sub