Hi Anthony,

The UserControlUrl should be a child (grand-grand-..-child) of ContentTabItem and ContentTabItem should be a child (grand-grand-..-child) of WebTab. It means that you always may identify to which exactly tab-item and WebTab belongs a particular UserControl. I guess, similar search should be applied to any "unknown" container of UserControl. I am not expert in vb, so I wrote cs codes for you, which show how to find parent tab-item and its WebTab. The vb should be very similar.

 protected void Page_Load(object sender, EventArgs e)
 {
  Control ctrl = this;
  while (ctrl != null)
  {
   ctrl = ctrl.Parent;
   if (ctrl is Infragistics.Web.UI.LayoutControls.ContentTabItem)
   {
    Infragistics.Web.UI.LayoutControls.ContentTabItem tab = (Infragistics.Web.UI.LayoutControls.ContentTabItem)ctrl;
    int index = tab.Index;
    string text = tab.Text;
    string key = tab.Key;
    while (ctrl != null)
    {
     ctrl = ctrl.Parent;
     if (ctrl is Infragistics.Web.UI.LayoutControls.WebTab)
     {
      Infragistics.Web.UI.LayoutControls.WebTab webTab = (Infragistics.Web.UI.LayoutControls.WebTab)ctrl;
      int selected = webTab.SelectedIndex;
     }
    }
   }
  }
 }