<Canvas Width="450" Height="350">
    <Canvas.Resources>
        <Storyboard x:Name="myStoryboard">

            <!-- Animate the center point of the ellipse from 100 X, 300 Y
             to 400 X, 100 Y over 5 seconds. -->
            <PointAnimation
             Storyboard.TargetProperty="Center"
             Storyboard.TargetName="MyAnimatedEllipseGeometry"
             Duration="0:0:5" 
             From="100,300"
             To="400,100"
             RepeatBehavior="Forever" />

        </Storyboard>
    </Canvas.Resources>
    <Path Fill="Blue" Loaded="Start_Animation">
        <Path.Data>

            <!-- Describes an ellipse. -->
            <EllipseGeometry x:Name="MyAnimatedEllipseGeometry"
             Center="200,100" RadiusX="15" RadiusY="15" />
        </Path.Data>
    </Path>
</Canvas>

' Start the animation when the object loads
Private Sub Start_Animation(ByVal sender As Object, ByVal e As EventArgs)
    myStoryboard.Begin()
End Sub

// Start the animation when the object loads
private void Start_Animation(object sender, EventArgs e)
{
    myStoryboard.Begin();
}