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HTREEITEM handle_new_creat_treeitem; //保存新建的树节点句柄
HTREEITEM handle_SelectedTreeItem; //保存当前选中的树节点的句柄
handle_SelectedTreeItem = m_tree.GetSelectedItem();
handle_new_creat_treeitem = m_tree.InsertItem("select item",0,1,handle_SelectedTreeItem);