anyone use game center to make multiple connect???

http://www.cnblogs.com/andyque/archive/2011/06/24/2088383.html

i try to learn the cocos2d function to use gamecenter.

achivement and leadboard are both ok,

but:

#import“GCHelper.h”
@interface HelloWorldLayer : CCLayer

how to inherit the GCHelperDelegate in the C++ .h file???

xcode says cant find GCHelperDelegate…