Code:
addSQL = "INSERT INTO history ([id], [partner], [from], [msgdate], [msgtime], [message]) VALUES ('" + thisid + "','" + chat.DialogPartner + "','" + chatmessage.FromHandle + "','" + chatmessage.Timestamp.Date + "','" + chatmessage.Timestamp.TimeOfDay + "','" + chatmessage.Body + "'