用VC++访问XML文件

MSXML4
//引入msxml4.dll
#import "C:/WINNT.0/system32/msxml4.dll"
//创建XMLDOMDocument指针
MSXML2::IXMLDOMDocumentPtr pXMLDoc;
// 初始化COM接口
::CoInitialize(NULL);
// 通过智能指针创建一个解析器的实例
HRESULT hr;
hr =pXMLDoc.CreateInstance(__uuidof(MSXML2::DOMDocument30));
//加载文件
pXMLDoc->load("f://he.xml");
//在树中查找名为City的节点,"//"表示在任意一层查找
MSXML2::IXMLDOMElementPtr childNode ;
childNode = (MSXML2::IXMLDOMElementPtr)(pXMLDoc->selectSingleNode("//AUTHOR"));
//得到节点类型
MSXML2::DOMNodeType nodeType;
childNode->get_nodeType(&nodeType);
//节点名称
BSTR var;
CString name;
childNode->get_nodeName(&var);
name = (char*)(_bstr_t)var;
//节点值
VARIANT varVal;
childNode->get_nodeTypedValue(&varVal);
CString strValue = (char*)(_bstr_t)varVal;
读属性：
//节点属性,放在链表中
MSXML2::IXMLDOMNamedNodeMapPtr pAttrs = NULL;
MSXML2::IXMLDOMNodePtr pAttrItem;
childNode = (MSXML2::IXMLDOMElementPtr)(pXMLDoc->selectSingleNode("//NUM"));
childNode->get_attributes(&pAttrs);
long nCount ;
pAttrs->get_length(&nCount);
for(int i = 0 ; i < nCount ; i++)
{
pAttrs->get_item(i,&pAttrItem);
//我们可以通过函数get_nodeName,get_nodeTypedValue得到属性名和属性值
//也可以直接得到
CString strAttrName = (char*)(_bstr_t)pAttrItem->nodeName;
CString strAttrValue = (char*)(_bstr_t)pAttrItem->nodeTypedValue;
}

HRESULT hr;
IXMLDomDocument* pXMLDoc;
IXMLDOMNode* pXDN;
Hr=CoInitialize(NULL); //COM的初始化
hr=CoCreateInstance(CLSID_DOM Document,NULL,CLSCTX_INPPROC_SERVER,
IID_IXMLDOMDocument,(void**) &pXMLDoc);
hr=pXMLDoc->QueryInterface (IID_IXMLDOMNode,(void**)&pXDN);