Why are built in dlls preferred over native

[Fabian Maurer]

> For d3d8, if anything installs native in a system location, that can't
> work and we have to prefer builtin. (I can't verify right now, but I'd
> guess that directx installers, which are run often especially on
> steam, do that.)

I see, but what about programs that ship their down d3d8 layer? Maybe it would
be possible to only prefer native dlls not inside system32/syswow64, aka only
those in the application directory?

Regards,
Fabian Maurer