I want to call a Haskell function with string arguments and a string result from VBA
(MS Access).
I already know that the Com-Library of HDirect provides marshallBSTR and
unmarshallBSTR functions, but up to now I didn't manage to get it working. (A
beginner's fault, I suppose.)
What must the function definition of, let's say, a function
f :: String -> IO String
look like in order to make it callable from VBA within a DLL build with GHC?
(With the former help of Sigbjorn Finne I'm already doing fine with calling Haskell
functions with arguments of "simple" types like Int.)
Thanks in advance! - Christian Lescher
