windows automation with ruby win32ole - access an enum

accessing methods and properties from ruby win32ole gem seems easy, but what do I do when I have to set an enum more specifically, i am trying to set o开发者_如何学Cne of the values defined by warningLevelOption defined for VCProjectEngine but nothing seems to work. none of the objects accessible via win32ole , will not recognize this enum, and setting an integer value causes an exception in visual studio

how can I set this value ?