Datagridview

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VB

Hi
I am using vb.net windows app. 2005 with ms access.
In my form I am using dtatgrid view.
I want to retrieve all records of databse to my gridviewcontrol.

But in gridview I have 5 unbound columns.
In form load event I am writing this code.

        Try
    If (cn.State = ConnectionState.Open) Then
        str = "select lrry_sr_no,lrry_item_name,lrry_item_quantity,lrry_item_weight,lrry_item_unitofmeasurement from lorry_item_detail where lrry_no='" & txtlr3.Text & "'"
        cmd = New OleDbCommand(str, cn)
        da = New OleDbDataAdapter(cmd)
        Dim dta As New DataSet
        da.Fill(dta, "lorry_item_detail")
        griditem.DataSource = dta.Tables("lorry_item_detail")

    Else
        MsgBox("Connection Is Closed")
    End If
Catch ex As Exception

End Try

But by this code I know it will create a new datasource and create bound columns related to it. But how can I retrieve this data directly to unbound columns. How to assign datasource or like that to unbound columns?