Hello *, I am trying to turn a prototype written in Haskell into something I can call from a Visual Studio C++ 6.0 program. (The prototype is so clean and fast that there is no point in recoding everything.) So I followed the instructions in section 11.5 of the ghc manual ("Building and using Win32 DLLs") and ended up as follows: $ ghc -c dllMain.c dllMain.c:4: warning: type defaults to `int' in declaration of `EXTFUN' dllMain.c:4: warning: parameter names (without types) in function declaration dllMain.c:4: warning: data definition has no type or storage class dllMain.c: In function `DllMain': dllMain.c:18: error: `__stginit_Adder' undeclared (first use in this function) dllMain.c:18: error: (Each undeclared identifier is reported only once dllMain.c:18: error: for each function it appears in.) Section 8.2 proposes to add extern void __stginit_Adder(void) which actually works. So it seems that section 11.2 is not up-to-date!