Hi, I tried googling and searching the haskellwiki about this but wasn't lucky enough. My question is: is there a way to send struct arguments to C functions via the FFI or do I need to create a C wrapper? I guess there isn't, and while I can live without it, I'd like to leave no doubt. Details: I have something like ==================== typedef struct vect { float x,y; } vect; void func(vect v); ===================== on the C side and ==================== -- Please disregard float /= Float, just an example :) data Vector = Vector Float Float instance Storable Vector where ... ==================== on the Haskell side, and I want to call func with Vector as argument. Now, Vector isn't a basic FFI type, although it implements Storable. So does that mean that I need to create something like ==================== void funcWrapper(vect *v) { func(*v); } ==================== and then allocate some temporary memory on the Haskell side to use func? Cheers! -- Felipe.