You don't have to switch IDEs. The QT libraries and headers are just libraries and headers. You can write code in any IDE, or in notepad, that uses Qt libraries.
Qt is good, but they do tend to require their build tools (beyond the IDE itself, they use their own dialog/UI painter).
I can highly recommend wxWidgets. It is somewhat on par with Qt for GUI production, though in a different style and without custom compilation steps. It works with most IDE's.
That said, if you intend to make a Windows only application (which I don't prefer, myself), you can look into Microsoft's MFC, ATL, etc.
If you're GUI needs are simple, you might check out FLTK.