Hi Volkan,

You need to catch the ItemDataBound event when the row is bound to the
datarow. At that point, you can test if you are dealing with a regular row.
If so, get an instance of the cell you're after and change its colour value.
The sample people should get you started.

Let us know if this helps?

Ken
Microsoft MVP [ASP.NET]
Toronto

  Private Sub Page_Load _
   (ByVal sender As System.Object, _
   ByVal e As System.EventArgs) _
   Handles MyBase.Load
       If Not IsPostBack Then
           DataGrid1.DataSource = CreateDataSource()
           DataGrid1.DataBind()
       End If
   End Sub
   Private Sub DataGrid1_ItemDataBound _
   (ByVal sender As Object, ByVal e As _
   System.Web.UI.WebControls.DataGridItemEventArgs) _
   Handles DataGrid1.ItemDataBound
       If e.Item.ItemType = ListItemType.Item Or _
       e.Item.ItemType = ListItemType.AlternatingItem Then
           If e.Item.Cells(0).Text = "4" Then
               e.Item.Cells(0).BackColor = Color.Red
               e.Item.Cells(3).BackColor = Color.Red
           End If
       End If
   End Sub
   Function CreateDataSource() As ICollection
       Dim dt As New DataTable
       Dim dr As DataRow
       dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
       dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
       dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
       dt.Columns.Add(New DataColumn("Boolean", GetType(Boolean)))
       Dim i As Integer
       For i = 0 To 8
           dr = dt.NewRow()
           dr(0) = i
           dr(1) = "Item " + i.ToString()
           dr(2) = 1.23 * (i + 1)
           dr(3) = True
           dt.Rows.Add(dr)
       Next i
       Dim dv As New DataView(dt)
       Return dv
   End Function 'CreateDataSource