I\'m totally new in using Qt and I don\'t know a lot of stuff.
As a test I created a simple application using Visual Studio 2012 and Qt-VS-Add-in ba
For Windows you need to include qminimal.dll and qwindows.dll, you will have to put them in folder called platforms.
Even if you program is small you still call huge libraries to do the graphical interface. If the size is really important you should do a console project.
PS : You can check all the libraries you really need by opening your exe with the dependency walker.