The handle of the root item; otherwise NULL .

返回根项的句柄；否则返回NULL。

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The first item to note about Listing 3 is that you are logging in directly to the remote machine as root.

关于清单3，需要说明的第一项内容是，您作为root用户直接登录到远程计算机。

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The snippet in Listing 11 creates the XML structure by creating a cart element, and an item element and its sub-elements. It populates them with values and adds them to the Document root.

清单 11 中的代码通过创建一个 cart 元素、一个 item 元素和它的子元素来创建 XML 结构，然后使用值填充这些子元素并将它们添加到 Document 根。

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