I have finished a small test application in Qt 4.3. For now it is a small database with gui to add and delete items and search the database. The application shows the use of QSettings, some use of SQL module and the basic multithreading. It is not finished as I yet don't have the answers to the question from the previous post. Anyway if anyone wants the code of this application feel free to contact me and I'll send it to you. Best regards john_crichton.