retval?() public

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
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