TranslateTransform.BeginAnimation 停止后（动画停止）后的事件？

[zxypy]

我用TranslateTransform.BeginAnimation开始动画后，如何知道动画停止了，用哪个事件？求高手指点！

Dim clickPoint = Mouse.GetPosition(containerBorder)
Dim targetPoint As New System.Windows.Point()
targetPoint.X = clickPoint.X - interactiveEllipse.Width / 2
targetPoint.Y = clickPoint.Y - interactiveEllipse.Height / 2

Dim xAnimation As _
New DoubleAnimation(targetPoint.X, _
New Duration(TimeSpan.FromSeconds(1)))

interactiveTranslateTransform.BeginAnimation( _
TranslateTransform.XProperty, xAnimation, HandoffBehavior.Compose)

Dim yAnimation As _
New DoubleAnimation(targetPoint.Y, _
New Duration(TimeSpan.FromSeconds(1)))
interactiveTranslateTransform.BeginAnimation( _
TranslateTransform.YProperty, yAnimation, HandoffBehavior.Compose)

[zxypy]

补充一下：上面是我在例子中找到的代码，是让一个元素移动到鼠标的位置，但是后面不会写了，移动到停止后再触发一个事件看么写？
比如：
AddHandler “这里用什么事件？”, AddressOf MySub