WinAPI IOCP Programming: Scalable File I/O

The solution implements copying a folder with multiple files using asynchronous I/O in Windows. It is created mainly as a demonstration of WinAPI IOCP programming. unsigned __stdcall WorkThreadFunction(void* param)
    {
    ...
                io::OVERLAPPEDPLUS* ovlPlus = CONTAINING_RECORD(ovl, io::OVERLAPPEDPLUS, m_ovl);
    ...
                ovlPlus->m_poolClient->OnOperationCanceled(ovl);
    ...
                ovlPlus->m_poolClient->OnOperationCompleted(ovl, transferred);    
...
    }