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> I would use the undocumented newproxy function to create a global
> userdata and attach a __gc handler to be called when Lua closes:

> C:\Users\Peter>lua
> Lua 5.1.4  Copyright (C) 1994-2008, PUC-Rio
> > _X = newproxy(true)
> > getmetatable(_X).__gc = function() print "Goodbye" end
> >
> Goodbye
> ^C

Using the following code, I never see "Goodbye" printed. 

Lua 5.1.4  Copyright (C) 1994-2008, PUC-Rio
> require"luacom"
> e=luacom.GetObject("Excel.Application")
> _X = newproxy(true)
> getmetatable(_X).__gc = function()
>>	e=nil -- or e:Quit()
>>	print"Goodbye"
>> end

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