Put mask in a datagrid column

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VB9

VB

Hi to all
I want to put mask in the first column in my datagrid so it looks like
XX X X
I have try the above code without success.....

Any help is accepted!!!
My code is this

Private Sub Fill_List()
    Try
        cmd = New OleDbCommand(Master_RollerSQL, con)
        If con.State = ConnectionState.Closed Then con.Open()
        da = New OleDbDataAdapter(cmd)
        ds = New DataSet()
        da.Fill(ds, "master_roller")
        Master_Roller_DataGrid.DataSource = ds.Tables("master_roller")
        Master_Roller_DataGrid.Columns(0).Visible = False
        Master_Roller_DataGrid.Columns(1).HeaderText = "CODE"
        Master_Roller_DataGrid.Columns(1).Width = 50
        Master_Roller_DataGrid.Columns(1).DefaultCellStyle.Format = ("##_#_#")
        Master_Roller_DataGrid.Columns(2).HeaderText = "LINE"
        Master_Roller_DataGrid.Columns(2).Width = 70
        Master_Roller_DataGrid.Columns(3).HeaderText = "TYPE"
        Master_Roller_DataGrid.Columns(3).Width = 130
        Master_Roller_DataGrid.Refresh()
        con.Close()
    Catch ex As Exception
        MsgBox(ex.Message, MsgBoxStyle.Critical, Me.Text)
    End Try
    Current_Click = -1
End Sub