Add transition effect to RadOutlookBar selected item

[MahMah]

Hi,

I have worked a lot with MS Blend to find out what is the selected item content template in RadOutlookBar but I couldn't find it.

Does any one know how to add transition effect to the contents when selected item changes in RadOutlookBar ?

To be more clear, suppose we have this XAML code :

<telerik:RadOutlookBar
Width="300" >
    <telerik:RadOutlookBarItem Header="test1">
        <Button Width="100" Height="25">abc</Button>
    </telerik:RadOutlookBarItem>
    <telerik:RadOutlookBarItem Header="test2">
        <Button Width="100" Height="25">efg</Button>
    </telerik:RadOutlookBarItem>
</telerik:RadOutlookBar>

When transiting from test1 to test2, I want that efg button get showed with transition effect.

Thank you for you attention.