The animation extension containing tracks and environment settings.
[Visual Basic 6.0] Property AnimationExtension As IAnimationExtension
[Visual Basic .NET] Public Property AnimationExtension As IAnimationExtension
[C#] public IAnimationExtension AnimationExtension {get; set;}
[Java] public IAnimationExtension getAnimationExtension() throws IOException, AutomationException
[C++] HRESULT get_AnimationExtension( IAnimationExtension** ppAnimExt );