Creating a Model in Qt Creator

I'm developing using Qt creator. If you create a non-Qt c++ application, you'll get a model of the program that says Hello world.Is it possible to change this initial state arbitrarily?Specifically, I would like to include the macro when creating the file and the boost library.
If possible, I would appreciate it if you could tell me how to do it.
qtcreator-4.5.0-2.