Hey, thank ive found out already, i use Qt Creator it 's much easier!
Unfortunately the .ui files from /qt/forms folder don't include the possibility of modifying the header menus.
I keep looking for!
Thank you for responding btw
If you are talking about the menu bar widget that looks like this:

Then you can skin that by replacing the style sheet with
QMenuBar ... instead of
QWindow.
Hi
Oh okkk, i dont quite understood sorry.
What is QMenuBar? Is this a part of Qt Creator or something? And which file would it be to be modified, in the bitcoin source code for example?
Thanks