Como usar CalendarStore Framework?

Hola de nuevo... Estoy probando una cosa que he visto que es crear un .mm y así puedo mezclar en el mismo código C++ y Obj-C, inicialmente para que bien pero al compilar me aparece:

'EXTERNAL_DECLARE_FUNCTION_OBJC' was not declared in this scope

Es la declaracion externa de la librería. Tengo que crear un .h para ella?

Salut, Josep

(es que no me deja ponerlo como comentario) :(

Hola, Aquí dejo el código pero lo pega raro.

El error es:

'EXTERNAL_DECLARE_FUNCTION_OBJC' was not declared in this scope

#include <revolution/external.h>
 #include <cstdlib>
#include <cstdio>
#include <cstring>

// Include the relevant headers
#import <CalendarStore/CalCalendar.h>
#import <CalendarStore/CalCalendarStore.h>

// BEGIN USER DEFINITIONS

// Returns a list of all calendar UIDs

void CalCalendars(char *p_arguments[], int p_argument_count, char **r_result, Bool
*r_pass, Bool *r_err)
{
// First fetch the calendar store - note this is a 'get' so we don't have
// to worry about release.
CalCalendarStore *t_store;
t_store = [CalCalendarStore defaultCalendarStore];

// If fetching failed, there must be a problem with the iCal database.
if (t_store == nil)
{
    *r_result = strdup("Could not fetch calendar store");
    *r_err = True;
    return;
}

// Make ourselves a mutable string to build up the UID list - note we
// aren't using a method with 'init' or 'alloc' here, so this object 
// will go into the autorelease pool.
NSMutableString *t_calendars;
t_calendars = [NSMutableString stringWithCapacity: 0];

// Loop through the calendars, accumulating the UIDs in a return-delimited
// list.
bool t_first;
t_first = True;
for(CalCalendar *t_calendar in [t_store calendars])
    [t_calendars appendFormat: (t_first ? @"%@" : @"\n%@"), [t_calendar  
      uid]];

// Finally encode our calendars string in MacRoman as a CString and
// return it.
// Note we have to copy the string as ownership passes to the externals stub 
// library and LiveCode.
// Also note that the object allocated by cStringUsingEncoding is again in
// the auto-release pool (notice no alloc/init) so we don't have to release.
*r_result = strdup([t_calendars cStringUsingEncoding: NSMacOSRomanStringEncoding]);
*r_err = False;
    }

  // END USER DEFINITIONS
  //
  //////////////////////////////////////////////////////////

 EXTERNAL_BEGIN_DECLARATIONS("calendar")

 // BEGIN USER DECLARATIONS

 EXTERNAL_DECLARE_FUNCTION_OBJC("calCalendars", CalCalendars)

  // END USER DECLARATIONS

 EXTERNAL_END_DECLARATIONS

Salut, Josep