..., DirectPlay, DirectPlay Voice), adding some missing GUIDs for XAudio2 and Direct3D 10.1, and updating from XACT to XACT3 GUIDs. DXGUID is just a convience. You can always use the GUID_DEFS_ONLY or INITGUID #defines in one of your project link modules to cause the various headers to declare an instance of the GUID. -- -Chuck Walbourn SDE, XNA Developer Connection This posting is ...