void AddAt(int index, ClassXXX* pCls);
  Property Description  
    Method Name AddAt  
    Argument - index The position at which the item should be added, 0 for the beginning of the collection, using the value returned from GetCount() will add to the end.  
    Argument - pCls The class to be added to the collection.  
    Description Adds a class to the collection in a specific location  
    Remarks Causes the OnCollectionChange to be fired, after the class is added.