Windows Portable device event monitoring using MFC C++

Question

I need to develop an application to monitor events on Portable devices using C++ MFC. I'm using WPD API for the same. But encountering a few issues. I am not getting the Filename in case of the delete operation. and also not able to register for more than one Portable device.

HRESULT hr = S_OK;
PWSTR eventCookie = nullptr;
ComPtr<IPortableDevice> device;

   device = nullptr;
   hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);

   DWORD pnpDeviceIDCount = EnumerateAllDevices();

   for(int i=0;i<pnpDeviceIDCount;i++)
   {
       ChooseDevice(&device,i);
       if (device == nullptr)
       {
           continue ;
       }

       RegisterForEventNotifications(device.Get(), &eventCookie);
   }
 CoUninitialize();