Hi! I''m programming with DirectX. I''m using DirectX SDK 7.0a. If I use older interfaces (max. DirectX SDK 3) is my program compatible with NT 4.0 which has service pack with DirectX 3? Or can I download the old DirectX SDK 3.0 somewhere? Thanks Floru

Yeah, if you use older versions of all the interfaces it should work. The only thing that you will have to watch for is the SDK telling you to do something with/for a particular interface that is newer than the version of that interface that you are able to use. In that case I would just fall back on code complete where I could.