我调用了什么消息或事件，我调用了CListCtrl :: InsertItem（）方法？

I was planning to implememt owner-drawn of CListCtrl. I thought that drawing an item is after the item is inserted into the control. So my method is declare a class which is derived from CListCtrl and override its DrawItem() method. The problem is DrawItem is never invoked after inserting an item. Is there anything wrong with my method?I was planning to implememt owner-drawn of CLis