code: public int writeHeader(RiffChunkHeader hriff_header)
  	{
  		if (fmode != RFM_WRITE)
  		{
  			return DDC_INVALID_CALL;
  		}
  		
  		int status = writeHeader_internally(hriff_header);
  		if (status==DDC_SUCCESS) riff_header.ckSize+=8;
  		return status;
  	}
docs: Write NumBytes data.