Datagrid view control

Question

Hi,
i am developing vb.net2010 application.my application share market based application.my question,i am using datagrid view control 4 row and 3 col ( stockname,price,select) last col add buttons.i need button click automatic values updated every second pls help me.

my code :

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

        Dim metaRTOpen As New Threading.Thread(AddressOf OpenData)

        metaRTOpen.Priority = Threading.ThreadPriority.Highest

        metaRTOpen.Start()

    End Sub

Private Sub DGridStock_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DGridStock.CellClick

        

        If e.ColumnIndex = 2 Then

            x = DGridStock.CurrentCellAddress.Y

            y = DGridStock.CurrentCellAddress.X

            DGridStock.Rows(x).Cells(y - 1).Value = ComboBox1.Text

            DGridStock.Rows(x).Cells(y).Style.ForeColor = Color.Green

            DGridStock.Rows(x).Cells(y).Style.BackColor = Color.Red

            Symbol = ComboBox1.Text

            Timer1.Start()

        End If

    End Sub