Hi Andreas, Oops I feel I must apologise. Having re-read my previous lengthy post on this thread I feel that an inadvertent remark may have been open to misinterpretation. In that mail I stated the following: "Ahem, now I dare to disagree with the guru (sic)". This remark was not in the least aimed at you or your research efforts, but was rather a comment indicating that I held a very different opinion to Robert Stevens; one of the best researchers I have ever met. Flippancy is always getting me into trouble. *smile* Once again my apologies. Dónal __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind