I've been trying to build a tab control, as an alternative to the MS IE
TabStrip and MultiPage.

It works great.  Except for anything that's actually put onto one of
the tabs.

Controls on the tabs render fine, but their postback events and
postback data changes just don't happen.  I've been working a seriously
kludgy thing to get around this and manually raise postback data and
event stuff, but I shouldn't have to be doing that.  I have the source
code for the MS IE controls, and they don't do anything like that.

I did some comparisons in debug mode, and I found a difference, but I
don't understand the significance of it.  If I type in the ID of a
control that's on one of the tabs, all of its info shows up, in both my
control and theirs.  But if I do FindControl(controlID), the control on
the MS MultiPage is seen, and the one on mine returns Nothing.

Here's a partial listing.  btnInside is on a Tab in my TabControl, and
btnDelItem is on a PageView in an MS MultiPage control:

?btnInside
{System.Web.UI.WebControls.Button}
   BindingContainer: {ASP.WebForm4_aspx}
   CausesValidation: True
   ClientID: "btnInside"
   CommandArgument: ""
   CommandName: ""
   Enabled: True
   EnableViewState: True
   ID: "btnInside"
   NamingContainer: {ASP.WebForm4_aspx}
   Page: {ASP.WebForm4_aspx}
   Parent: {MyStuff.WebPL.Tab}
   Site: Nothing
   TemplateSourceDirectory: "/LisaTest"
   Text: "btnInside"
   UniqueID: "btnInside"
   Visible: True

?FindControl("btnInside")
Nothing

?btnDelItem
{System.Web.UI.WebControls.Button}
   BindingContainer: {ASP.default_aspx}
   CausesValidation: True
   ClientID: "btnDelItem"
   CommandArgument: ""
   CommandName: ""
   Enabled: True
   EnableViewState: True
   ID: "btnDelItem"
   NamingContainer: {ASP.default_aspx}
   Page: {ASP.default_aspx}
   Parent: {Microsoft.Web.UI.WebControls.PageView}
   Site: Nothing
   TemplateSourceDirectory: "/QMI"
   Text: "Delete"
   UniqueID: "btnDelItem"
   Visible: True

?FindControl("btnDelItem")
{System.Web.UI.WebControls.Button}
   [System.Web.UI.WebControls.Button]:
{System.Web.UI.WebControls.Button}
   BindingContainer: {ASP.default_aspx}
   ClientID: "btnDelItem"
   EnableViewState: True
   ID: "btnDelItem"
   NamingContainer: {ASP.default_aspx}
   Page: {ASP.default_aspx}
   Parent: {Microsoft.Web.UI.WebControls.PageView}
   Site: Nothing
   TemplateSourceDirectory: "/QMI"
   UniqueID: "btnDelItem"
   Visible: True

Neither the PageView or the Tab have an ID set.  I'm sure that the
difference when I try FindControl has to be related to the problem I'm
having, but I just keep coming up with nothing.

If anyone can help, I'd be so grateful.

Thanks,
Lisa