| DirectX SDK | 
The IDirectSound3DListener::GetAllParameters method retrieves information that describes the current state of the 3-D world and listener.
HRESULT GetAllParameters( LPDS3DLISTENER lpListener );
If the method succeeds, the return value is DS_OK.
If the method fails, the return value may be DSERR_INVALIDPARAM.
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dsound.h.
  Import Library: Use dsound.lib.