CArchive的版本控制功能

pb1 =

(CObject1*)AfxDynamicDownCast( RUNTIME_CLASS(CObject1), pb );

AfxMessageBox( pb1->m_str );

break;

case 2:

pb2=

(CObject2*)AfxDynamicDownCast( RUNTIME_CLASS(CObject2), pb );

AfxMessageBox( pb2->m_str2 );

break;

default:

AfxMessageBox( "Unkown Object!" );

break;

}

delete pb;

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