public int Expect(String Data, int NumBytes )
   {
      byte	target = 0;
	  int	cnt = 0;
   	  try
 	  {
	  	   while ((NumBytes--) != 0)
      	   {
    	 		target = file.readByte();
				if (target != Data.charAt(cnt++)) return DDC_FILE_ERROR;
		   }			
      } catch (IOException ioe)
 		 {
 		   return DDC_FILE_ERROR;
		 }   
   		return DDC_SUCCESS;
   }