Thanks. Which event can I use to trigger fetching the start and end points?

Unfortunately, the Timeline doesn’t fire such events. The thing you can do is handle the Zoombar events. Try using this code:

void MainPage_LayoutUpdated(object sender, EventArgs e)
        {
            XamZoombar zoombar = FindZoombar(this.timeline1);
 
            zoombar.ZoomChanged += new EventHandler<ZoomChangedEventArgs>(zoombar_ZoomChanged);
            zoombar.ZoomChanging += new EventHandler<ZoomChangeEventArgs>(zoombar_ZoomChanging);
 
            this.LayoutUpdated -= MainPage_LayoutUpdated;
        }
 
        private void zoombar_ZoomChanging(object sender, ZoomChangeEventArgs e)
        {
            
        }
 
        private void zoombar_ZoomChanged(object sender, ZoomChangedEventArgs e)
        {
            
        }
 
        private XamZoombar FindZoombar(DependencyObject parent)
        {
            XamZoombar zoombar = null;
 
            int count = VisualTreeHelper.GetChildrenCount(parent);
 
            for (int i = 0; i < count; i++)
            {
                DependencyObject obj = VisualTreeHelper.GetChild(parent, i);
 
                zoombar = obj as XamZoombar;
 
                if (zoombar != null)
                {
                    return zoombar;
                }
                
                zoombar = FindZoombar(obj);
 
                if (zoombar != null)
                {
                    return zoombar;
                }
            }
 
            return zoombar;
        }

Hi Teodor

Have tried using your code. I may be missing a reference or using statement. Am getting these errors:

The type or namespace name 'ZoomChangeEventArgs' could not be found (are you missing a using directive or assembly reference?)

The type or namespace name 'ZoomChangedEventArgs' could not be found (are you missing a using directive or assembly reference?)

The type or namespace name 'XamZoombar' could not be found (are you missing a using directive or assembly reference?)

I have the following references:

InfragisticsSL4.Controls.Timelines.Xam.Timeline.v10.3

InfragisticsSL4.DataVisualization.v10.3

and the following using statements:

...

using Infragistics;
using Infragistics.Controls.Maps;
using Infragistics.Controls.Timelines;

...

Please advise?

Actually I just discovered it - I needed 'using Infragistics.Controls'