The problem with playing multiple screens

[Mangomm]

I have a practical problem with implementing multi-window playback. At the bottom, I use C++ to generate a DLL from my class and provide it to the calling layer to call in C#. C# only needs to provide a handle argument, and C++ uses this handle to play the video, so that when C# creates multiple C++ class objects, it can play multiple Windows. How can I implement this if I use QtAV? Does QtAV support this?

Note, this is the actual application scenario encountered. C++ handles the bottom layer and C# serves as the application layer. It's actually quite common for C++ to generate DLLS for other programming languages to develop, and I'd love to see QtAV support that. Hope to receive your reply, thank you!