ctypes type of thing?

[Duck <duck@...>]

Can't find the answer obviously on the various Lua community sites...

...but has anyone done a ctypes-like pacakge for Lua?

I'm particularly interested in this on Windows, as a mechanism for 
experimenting with calls to DLL functions. (I work in security research so 
you can see how this might be handy, e.g. to see what return values 
specific calls in malware might be looking out for.)