what does this statement mean?

My tutorial talks about restore the dataset on a re-render.
this statement is used:



Private Sub DataGrid1_PageIndexChanged(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataGridPageChangedEventArgs) Handles DataGrid1.PageIndexChanged

DataSet11 = CType(Session("dsOrders1"), dsOrders).copy
End Sub


what does the "dsOrders" do? the book does not explain this statement at all. In the sample code I do not see it defined anywhere

Ok, did a little searching and realized we are instatiating off off Dataset1