Hi Uma,
Thanks for reply. Custom Catalog sample works like in your picture. I see that there is no vertical separator.
I have used my own usercontrol before 2.2 version. I have changed only my style to Esri_ListBoxPanelIndicator style in version 2.2 and it works fine. In 2.2 tabcontrol worked with simple IEnumerable which contained my own objects with tab information. As I understand it works now with List of TabControl items only.
Can anyone tell me how to configure the Esri_ListBoxPanelIndicator in 2.9 to show the list of tabs when the ellipsis button is clicked?