GWorldPtr wxMacCreateGWorld( int width , int height , int depth ) ;
void wxMacDestroyGWorld( GWorldPtr gw ) ;
PicHandle wxMacCreatePict( GWorldPtr gw , GWorldPtr mask = NULL ) ;
GWorldPtr wxMacCreateGWorld( int width , int height , int depth ) ;
void wxMacDestroyGWorld( GWorldPtr gw ) ;
PicHandle wxMacCreatePict( GWorldPtr gw , GWorldPtr mask = NULL ) ;