I want to change the background of certain cells in response to data value changes of other cells. So i hook the DataValueChanged and ...

private void xamDataGrid1_DataValueChanged(object sender, DataValueChangedEventArgs e)
{
    var recordPresenter = e.Record;
    var record = e.Record.DataItem as MyObject;
    if (record == null) return;

    if (record.TargetValue != record.ActualValue)
    {
        //i can change the background of the originating cell
        e.CellValuePresenter.Background = Brushes.LightSalmon;
        // but i want to change the other cell as well...
        var cell = recordPresenter.Cells["TargetValue"];
        // HOW DO I GET THE CellValuePresenter OF THIS CELL??
    }
}