ReportControl: Row backcolor

How do I set the backcolor of a row in the reportcontrol?

I need to change the backcolor in some occassions when adding items to the control:

For t = Start to End
    Set Record = frmArticles.ArticlesControl.Records.Add
    Set Item = Record.Additem(rs.Value("Subject"))
    Set Item = Record.Additem(rs.Value("NumberOfMessages")
    If NumberOfMessages = 0 then
       '--- Set Backcolor of this row to red
       '???  
     end if
Next

I can set the background of the current item here, but I want to change the backcolor of the current row.