Hi,
Is it possible to build KTorrent under Windows? I see you're using CMake for building and I see the line:

find_package(KDE4 4.4.0 REQUIRED)

what bothers me. Should I try to build it under Windows or it is pointless?

It's not that easy. You require either mingw or visual studio, and then you need to install KDE and several dev packages (cmake, kdelibs, kdepimlibs, libgcrypt, libgmp, QCA2).

Once you have those, you need to run cmake (if you use visual studio, then take a look at the -g option to generate a workspace and project files).

I hope they fixed that annoying bug with the wrong paths in some cmake files of KDE, otherwise you will have to modify them in order for cmake to find everything.