Re: C invocation example does not work in 32bit

[jangko]

depends on your C compiler configuration, most of the times you need to specify 
the calling convention explicitly, for example: stdcall for msvc or cdecl for 
gcc

in your case, try add cdecl:
    
    
    proc addTwoIntegers(a, b: cint): cint {.importc,cdecl.}