[Chicken-users] Passing parameters to C

[William Ramsay]

Hi,

I'm still fairly new at Scheme and trying to do something quite 
difficult, which brings me up short every now and then.

I'm working with Gtk and easyFFI.    What I need to do is pass a 
parameter into a C function and get the same parameter passed back to me 
from C.    (I have a series of  similar color buttons and want to know 
which button was pressed - so I pass in the button number and will 
determine which one it was when I get the signal back)   The problem is 
that parameters are passed by value in Scheme and C expects  to get a 
pointer.     On the return signal I get an error that the value being 
returned is not a pointer.

Can anyone explain how I pass a pointer from Scheme into C.     Oddly 
enough #f is treated as a pointer, but nothing else seems to be.

Thanks,

Bill