code: def isDll(self):
          
          if (consts.IMAGE_FILE_DLL & self.ntHeaders.fileHeader.characteristics.value) == consts.IMAGE_FILE_DLL:
              return True
          return False
docs: Determines if the current L{PE} instance is a Dynamic Link Library file.
          
          @rtype: bool
          @return: C{True} if the current L{PE} instance is a DLL. Otherwise, returns C{False}.