Me.CustomersDataGridView.DataSource = Me.CustomersBindingSource
        Dim CustomersOrdersBindingsource As New BindingSource( _
          Me.CustomersBindingSource, "CustomersOrders")
        Me.OrdersDataGridView.DataSource = CustomersOrdersBindingSource
 
        Dim OrdersOrder_DetailsBindingsource As New BindingSource( _
          CustomersOrdersBindingsource, "OrdersOrder Details")
        Me.Order_DetailsDataGridView.DataSource = _
        OrdersOrder_DetailsBindingsource

Those people who think they know everything are a great annoyance to those of us who do - Isaac Asimov