casting result of QWidgetStack->currentWidget()

[Moppel]

I noticed that there where a couple of glitches in my example so I attach a new version.

I now had the chance to test this on Windows and I can't get it working.
Tried to figure the problem with listdlls (from SystInternals) and Dependency Walker (as described within the Trolltech documentation) but now I'm really stuck. Missing strace on Win and the error messages are far from elaborate not to say not present at all.
So if anyone could test this (example cast2c) on Windows and can tell where I'm going wrong, I'd really appreciate that. It is just giving me headaches.
It's more an academic urge to get it working on all three platforms but still I wish to figure it out.
It's working on both Linux and Mac OSX. (On the former you will see an error message which is correct and on the latter you really should read the README)

Thanks!