Private Sub TabControl1_SelectionChanged(ByVal sender As System.Object, _
     ByVal e As System.Windows.Controls.SelectionChangedEventArgs) Handles _
     TabControl1.SelectionChanged
 
      If TypeOf e.OriginalSource Is System.Windows.Controls.TabControl Then
         ' SelectionChanged durch TabControl ausgelöst.
      End If
   End Sub

Gru?
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Snoopy sagt - vb@rchiv find ich gut...
Schon gesehen? OSMMapViewer V2 Control