On Fri, Mar 14, 2014 at 4:46 PM, Miro Karpis <miroslav.karpis@gmail.com> wrote:
setmodulestring :: String -> String -> IO CInt
setmodulestring param value = do
cParam <- newCString param
cValue <- newCString value
let cParamLength = fromIntegral $ length param ::CInt
   cValueLength = fromIntegral $ length value ::CInt
   setVarInArray = (-1)::CInt 
result <- c_setmodulestring cParam cParamLength cValue cValueLength setVarInArray
return result

The path you show earlier looks like Windows; you probably want CWString for Win32 API functions (so newCWString etc.).

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