Using the outlook model, does anyone know the syntax for "Tell me when message has been read!"

Example Code:
Code:
With objOutlookMsg
    .To = Rst!email
    .Subject = mySubject
    .Body = "To All Parties Concerned:" & vbNewLine & vbNewLine
    .Importance = olImportanceHigh
    Set objOutlookAttach = .Attachments.Add(strAttachments)
'***********************************************************
'what would go here to use that feature
    .****Tell Me When Message Read *****    
'***********************************************************    
    .Send
    End With