Hi.  I'm trying to add a System.Web.UI.UserControl (Not a
System.Web.UI.WebControl) to an asp.net ajax tabpanel.

Unfortunately it doesn't appear that this is possible.  This question could
get very detailed, but I'll keep it short.  I have a subroutine shown below
which adds a tabpanels to a tabcontainer(Tabs1) based for each object in a
collection.  Then for each tabpanel I try to add a usercontrol named
uWebPage.  But when the Page_Load event for uWebPage fires I get null
reference exceptions when referencing controls on uWebpage.

Is this situation I'm trying (adding usercontrol to tabpanel) even possible?
Thanks!


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Dim oNewTab As AjaxControlToolkit.TabPanel
       Dim uWebpage As uWebpage

       For Each oAssociation As UserVideoAssociation In oAssociations
           For Each oWebpage As Webpage In oAssociation.Webpages
               oNewTab = New AjaxControlToolkit.TabPanel

               uWebpage = New uWebpage
               uWebpage.DomainName = oAssociation.DomainName
               uWebpage.Webpage = oWebpage.Webpage

               oNewTab.Controls.Add(uWebpage)

               oNewTab.HeaderText = oWebpage.Webpage
               Tabs1.Tabs.Add(oNewTab)
           Next
       Next
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