[plt-scheme] plt-ffi-array declaration-how?

Hi,

This is regarding FFI in plt scheme.

I want to define a Cstruct which has an array of 5 bytes as one of the 
slot.

As i see there are no array types. I used 5 one _byte slots as a 
temporary fix, which, I feel is not the correct form.

Any suggestions on the proper array declaration format?

regards,
raja koduru