COM constants iterable
Constants associated with a COM Object can be accessed by indexing the COM object with the constant name.
Example
local word = sys.COM("Word.Application")
local doc = word.Documents:Add()
local sel = word.Selection
-- Set the Seleciton.Paragraphs.Alignment property to wdAlignParagraphCenter
sel.Paragraphs.Alignment = word.wdAlignParagraphCenter