Developing file sharing program with QT

Hello all,
I was assigned to develop a kind of the "file sharing" program, that allows the users of my company's products to share some files in the real time mode.

By sharing I mean that each user of the specific product can give a right to copy his/her local files over the Internet to any other user of the same product.

It should be developed using QT to make it multiplatform.

I have never worked with QT neither have done a networking before. My experience is with Java, C++, MFC and Windows API and DirectX.

Where should I start? If somebody can point me in a correct direction, it would be greatly appreciated.

Thanks,
AC

http://doc.trolltech.com/latest is a good point to start - take a look at examples available, play with Qt a little and then just start coding. You'll surely need networking classes like QTcpSocket and file access classes like QFile. But first think if you are not trying to reinvent the wheel - maybe a private torrent or ftp/smb server would be sufficient for the job.