Gravar registros do ListBox no BD

Dim Cmd As FbCommand
        Dim Sql As String
        Dim Reader As FbDataReader
        Dim i As Integer
        Dim CodDivisaJuad As Integer = 1

        If CodJuad = "Novo" Then
            Return
        End If

        If IsNumeric(CodJuad) Then
            CodDivisaJuad = 1
            Cmd = New FbCommand("Select Max(Cod_Divisa) Cod from Divisa_Juad", connection)
            Reader = Cmd.ExecuteReader()
            If Reader.Read Then
                If Not IsDBNull(Reader("Cod")) Then
                    CodDivisaJuad = CInt(Reader("Cod")) + 1
                End If
            End If

            For i = 0 To lbxDivisa2.Items.Count = -1
                Sql = "INSERT INTO Divisa_Juad (Cod_Divisa, Cod_Juad)" & "Values("
                Sql = Sql & Strings.Right(lbxDivisa2.Items(i).ToString(), 5) & ","
                Sql = Sql & "'" & CodJuad & "')"
                AbreBanco()

                Cmd = New FbCommand(Sql, connection)
                Cmd.ExecuteNonQuery()
            Next
        Else
            For i = 0 To lbxDivisa2.Items.Count = -1
                Sql = "UPDATE Divisa_Juad set "
                Sql = Sql & "Cod_Juad = '" & CodJuad & "' "
                Sql = Sql & "WHERE Cod_Divisa = " & CodDivisaJuad

                '& ListBox1.Items(i).ToString() &
                AbreBanco()

                Cmd = New FbCommand(Sql, connection)
                Cmd.ExecuteNonQuery()
            Next
        End If