Application improved by using AosKernel.MilliTimer. Maximal available message length is limited to 1500 chars because of limitation of AosNet MTU size. New fixed version of UDPChat available under link: http://sage.com.ua/files/Sage.UDPChat.zip Web page of application: http://sage.com.ua/ru.shtml?e1l4 -- Cheers, SAGE http://sage.com.ua/