Tab control in vb 2005

I have a tab control on a form with 6 tabs. I would like to disable certain buttons on the form that are not on the tab if the focus changes to a different tabpage in the collection. I have tried the code below, but it doesn't work.
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Private Sub TabPage2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TabPage1.Click
        If TabPage2.Focused Then
            btnFirst.Enabled = False
        End If

    End Sub
   
Private Sub TabPage1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TabPage1.Click
        If CBool(CInt(TabPage1.Focused)) Then
            btnFirst.Enabled = False
        End If

    End Sub