Ed -

Not sure if it matters, when it comes to the basic question, but here
goes...

My intention is to utilize the Tab Pages similar to a Panel, but Tab
Pages does some nice design time layout. To completely suppress the tab
pages that are not current, and prevent them from being user selected, I
take them out of the on-screen tab-control and move them into a hidden,
manually created tab-control. Keeping hidden tab pages in a hidden tab
control is necessary to allow the form to close correctly.

I boiled this snippet to the most essential parts of my manual switch.

Private Sub GoToTabPage( ByRef NewTabPage as TabPage )
    Do While TabControl1.TabPages.Count > 0
        ' I would like to raise an event,
        ' TabControl1.TabPages(0).Validating here
        ' and I would suppress the following line if
        ' feedback says to Cancel (as well as going
        ' to the new tab of course)
        HiddenTC.TabPages.Add(TabControl1.TabPages(0))
    Loop
    TabControl1.TabPages.Add( NewTabPage )
    ' I would like to raise a NewTabPage.Enter event here
End Sub

I think regardless of the approach above, the mechanics of how to invoke
any event on a particular type of control instance is a much more
generic question.

- Lee