// Create the object
FW::FileWatcher* fileWatcher = new FW::FileWatcher();
 
// add a directory watch
FW::WatchID watchid = fileWatcher->addWatch("..\\media", new UpdateListener());
 
...
 
// somewhere in your update loop call update
fileWatcher->update();
 
// where UpdateListener is defined as such
class UpdateListener : public FW::FileWatchListener
{
public:
    UpdateListener() {}
    void handleFileAction(FW::WatchID watchid, const String& dir,
                                    const String& filename,
                                    FW::FileWatcher::Action action)
    {
        std::cout << "File (" << dir + \\ + filename << ") has event "
                        << action << std::endl;
    }
};