Merge diferent projects in a single one

[gtnoob]

Hi
Let's say i have n widgets (W1, W2, W3, ..., Wn), each of them created using Qt Designer using "Qt Widget Project" > "Qt Gui Application".
In this case, for each project i have the files:

w1.pro
main.cpp
w1.h
w1.cpp
w1.ui
...


Imagine that later i start a new applications and whant to use this widgets. I wish to keep each one of them in a separate folder, inside the main folder.
Whats the correct approach?
Thanks

[alrawab]

take a look at examples\dialogs pro file and pro file in sub dirs

[Lykurg]

Or use *.pri file which you can include in your new project.