程序展示了怎样设置PageLayoutControl的焦点地图，怎样使用IObjectCopy对象与PageLayoutControl的焦点地图的副本来改写MapControl的地图对象。地图对象必须拷贝时因为MapControl和PageLayoutControl不能同时共享相同的活动视图。-This program demonstrates how to set the PageLayoutControl s FocusMap and use the IObjectCopy object to overwrite the MapControl s map object with a copy of the PageLayoutControl s FocusMap. The map object must be copied because the MapControl and PageLayoutControl are unable to share the same ActiveView at the same time.