[求助]VB中对XML数据的搜索
<?xml version="1.0"?><UserInfoXML>
<UserInfo>
<UserName>赵七</UserName>
<Age>25</Age>
<EMail>zhaoqi@163.com</EMail>
<Address>山东省</Address>
</UserInfo>
<UserInfo>
<UserName>赵七</UserName>
<Age>25</Age>
<EMail>zhaoqi@163.com</EMail>
<Address>山东省</Address>
</UserInfo>
<UserInfo>
<UserName>张三</UserName>
<Age>24</Age>
<EMail>zhaangsan@126.com</EMail>
<Address>山东省</Address>
</UserInfo>
</UserInfoXML>
像上面的这段,在VB中如何来搜索UerName节点为[张三]的所有节点啊?