Extracts the per-sample cluster IDs from an ID3DXPRTCompBuffer compressed data buffer.
HRESULT ExtractClusterIDs( UINT * pClusterIDs );
If the method succeeds, the return value is S_OK. If the method fails, the following value will be returned.
D3DERR_INVALIDCALLHeader: Declared in D3dx9mesh.h.