kind=defined
names=retval?
visibility=public

--- retval?

Returns true if argument is return value.

   tobj = WIN32OLE_TYPE.new('DirectX 7 for Visual Basic Type Library',
                            'DirectPlayLobbyConnection')
   method = WIN32OLE_METHOD.new(tobj, 'GetPlayerShortName')
   param = method.params[0]
   puts "#{param.name} #{param.retval?}"  # => name true

