s the active disc recorder")]
      HRESULT _stdcall GetActiveDiscRecorder(
         [out] IVBDiscRecorder **ppRecorder);

      [helpstring("Sets the active disc recorder")]
      HRESULT _stdcall SetActiveDiscRecorder(
         [in] IVBDiscRecorder *pRecorder);

      [helpstring("Clears the contents of an unburnt image")]
      HRESULT _stdcall ClearFormatContent();

      [helpstring("Registers for progress notifications")]
      HRESULT _stdcall ProgressAdvise(
         [in] IVBDiscMasterProgressEvents