Hey, an easy one.  :-)

>LOCAL FN receiveRect(@rectAddr&)  'Takes address of var passed
>'do something
>END FN
>
>FN receiveRect(t%)

When you pass an address, it has to be passed as a long integer.  You'll
want to do something like this:

local fn receiveRect(@rectAddr&)
  dim bottom%
  rectAddr&.top%=30
  bottom%=rectAddr&.bottom%
  print rectAddr&.right%
  etc.
end fn

local fn doRect
  dim myRect.8
  call setrect(myRect,0,0,100,100)
  fn receiveRect(myRect)
end fn

fn doRect

HTH

____________
wave (Toronto, Canada)
Much better at "OOPS!" programming than OOP programming.