AE中编辑元素的写法：

IEnumElement pEnumElement = pGraphicsContainer.LocateElementsByEnvelope(pEnvelope);

 pEnumElement.Reset();

pElement = pEnumElement.Next();

IGraphicsContainerSelect pGraphicsContainerSelect = pGraphicsContainer as IGraphicsContainerSelect; pGraphicsContainerSelect.SelectElement(pElement);

pElemVert = pElement as IElementEditVertices;

 pElemVert.MovingVertices = true; pSelectionTracker = pElement.SelectionTracker;

pSelectionTracker.Display = pActiveView.ScreenDisplay;

axMapControl1.Refresh();