I found this: http://people.cs.uct...DK/EAX20SDK.exe but it doesn't declare the interface I want. It have a GUID named : IID_IEAXUnified. After creating the COM object it calls virtual function from it. I need this interface declared. Does somebody know where?

EDIT: The code Is:

if( (LPDIRECTSOUND8)lpAudioDevice.m_12->QueryInterface( &IID_IEAXUnified,  (EAX Interface) &lpAudioDevice.m_14 )

I found this: http://people.cs.uct.ac.za/~gmushwan/jverwey/pub/EAX%20SDK/EAX20SDK.exe but it doesn't declare the interface I want. It have a GUID named : IID_IEAXUnified. After creating the COM object it calls virtual function from it. I need this interface declared. Does somebody know where?