[plt-scheme] Using FFI with complex structures and input/output parameters?

I also wonder whether I should use "make-u8vector" instead of
"make-vector" to build a vector of bytes.

2009/7/1, Elena Garrulo <egarrulo at gmail.com>:
> Thank you for your corrections and suggestions. I've applied them and
> reduced again source code to help diagnosis, but the error message at
> "SCardTransmit" call is still there ("zero?: expects argument of type
> <real number>; given #<cpointer>"). I'm sending modified sources as
> attachment to avoid breaking indentation.
>
> Thank you for your attention.
>