UE4 as sub-process in Windows

I have a pre-existing application running in Windows that I would ideally like to be able to run a UE4 game in a sub-window of i.e. if the application was Media Player, I’d like to be able to host the game in the video area. Does anyone know of any way to do this?

I was hoping there would be an obvious way to tell UE4 a hwnd to render itself into or something along those lines but haven’t been able to find anything, any help would be greatly appreciated.

I don’t think you can do that… But never say never! (Why would you want to do that anyway? What are you planning?)

I think easiest way to do so would be move UE4 window to position to where you want in aplication, i think you may do that via Viewport classes:

You can also manipulate all windows on screen using standard Win32 calls.