Thanks for your quick response.

It would be great if you can provide me sample code for same.

Thanks

Samir

Hi Samir,
You can do this from the application - that is easier.
Storyboard _sbMinimizing = null, _sbMaximizing = null;
DoubleAnimation _daMinimizing = new DoubleAnimation(), _daMaximizing = null;
bool _skipMaximizing, _skipMinimizing;
double _expandedWidth = double.NaN;
private void xobW_NavigationPaneMinimizing(object sender, CancellableEventArgs e)
{
    if (_sbMinimizing == null && xobW != null)
    {
        xobW.MinimizedWidth = 66;
        _daMinimizing.EasingFunction = new CubicEase();
        _daMinimizing.Duration = new Duration(TimeSpan.FromMilliseconds(444));
        _daMinimizing.FillBehavior = FillBehavior.HoldEnd;
        Storyboard.SetTarget(_daMinimizing, xobW);
        Storyboard.SetTargetName(_daMinimizing, xobW.Name);
        Storyboard.SetTargetProperty(_daMinimizing, new PropertyPath("Width"));
        _sbMinimizing = new Storyboard();
        _sbMinimizing.Children.Add(_daMinimizing);
        _sbMinimizing.Completed += new EventHandler(_sbMinimizing_Completed);
    }
    if (_sbMinimizing == null || _skipMinimizing)
        return;
    _skipMinimizing = _skipMaximizing = true;
    xobW.AllowMinimized = false; // this will expand the outlookbar
    _daMinimizing.From = xobW.ActualWidth;
    _daMinimizing.To = xobW.MinimizedWidth;
    _expandedWidth = xobW.Width; // to restore the width in expanded mode 
    _sbMinimizing.Begin();
}
void _sbMinimizing_Completed(object sender, EventArgs e)
{
    _skipMinimizing = true; // this prevents minimizing storyboard to begin 
    xobW.AllowMinimized = true;
    xobW.IsMinimized = true;// now, we can minimize the outlookbar
    _skipMinimizing = false;
}
private void xobW_NavigationPaneExpanding(object sender, CancellableEventArgs e)
{
    if (_skipMaximizing)
    {
        _skipMaximizing = false; // this comes from minimizing storyboard
        return;
    }
    if (_sbMaximizing == null && xobW != null)
    {
        _daMaximizing = new DoubleAnimation();
        _daMaximizing.EasingFunction = new CubicEase();
        _daMaximizing.Duration = new Duration(TimeSpan.FromMilliseconds(444));
        _daMaximizing.FillBehavior = FillBehavior.Stop;
        Storyboard.SetTarget(_daMaximizing, xobW);
        Storyboard.SetTargetName(_daMaximizing, xobW.Name);
        Storyboard.SetTargetProperty(_daMaximizing, new PropertyPath("Width"));
        _sbMaximizing = new Storyboard();
        _sbMaximizing.Children.Add(_daMaximizing);
        _sbMaximizing.Completed += new EventHandler(_sbMaximizing_Completed);
    }
    if (_sbMaximizing != null)
    {
        _daMaximizing.From = xobW.ActualWidth;
        _daMaximizing.To = _daMinimizing.From ?? 333;
        _sbMaximizing.Begin();
    }
}
void _sbMaximizing_Completed(object sender, EventArgse)
{
    xobW.Width = _expandedWidth; // we need to restore previous width
} 

Marin

Thank you very much for sample Code, Marin.

Regards,
Jagan