code: def child(self, subkey):
          
          path = self._path + '\\' + subkey
          handle = win32.RegOpenKey(self.handle, subkey)
          return RegistryKey(path, handle)
docs: Retrieves a subkey for this Registry key, given its name.
  
          @type  subkey: str
          @param subkey: Name of the subkey.
  
          @rtype:  L{RegistryKey}
          @return: Subkey.