This is Wine DirectX support. It works in Reactos and Windows. When ReactOS own ReactX are in-place this file will be removed from our SVN for now they stay as temporary solutions. People that have helped getting this thing to work in ReactOS building system: Roderick Colenbrander - thunderbird2k at gmx dot net The informations how to build it and done the Windows port in Wine (Wine devloper). Magnus Olsen aka GreatLord Did import it to ReactOS and setup the build. GedMurphy Did help with minor issue, info how to make DllMain being called.