How to save a session in a Qt application?

I made this tool in Qt Creator where i have to enter some data in spin boxes and combo boxes. Each of these boxes have a default value when I open my tool. But I would like to implement a function to save the session of the application, i.e. if开发者_运维百科 i modify some values in the boxes i can save them and when I open my application again my modifications are there. And also when I am done with that data I can restore the defaults.

Any idea as to how to do this?

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Use QSettings , it's usage is explained in the page