Thanks!
I want to access a PostgreSQL, configure and test the connection like we do with Database classes of the Qt libraries. For files, I would like to have a way to write/read/verify existence of file like we do with a QFile, for example.
If there is some library (or libraries) which can help me to do these things, I think it is useful too.
Another thing that I want is to know how I can use the default components from Installer screens, like a Next/Previous/Cancel Button.