MSXML2::IXMLDOMProcessingInstructionPtr pProcessingInstruction;   
 pProcessingInstruction = xmlFile->createProcessingInstruction(_bstr_t("xml"), _bstr_t("version=\"1.0\" encoding = \"utf-8\""));
 xmlFile->appendChild((IXMLDOMNodePtr) pProcessingInstruction);

 IXMLDOMTextPtr ptrText = NULL;

 _bstr_t attrName = _T("");
 _variant_t attrVal = _T("");
 _bstr_t text;
 const _bstr_t bstrDefNs = _T("http://www.w3.org/2000/svg");
 _variant_t nodetype = long(NODE_ELEMENT);

//创建根节点
 _bstr_t name = _T("svg");
 IXMLDOMElementPtr pXmlRoot = xmlFile->createElement(name);
 if( pXmlRoot == NULL ) return;
 pXmlRoot = xmlFile->appendChild(pXmlRoot);

//给根节点添加属性

 attrName = _T("width");
 attrVal = float(500);
 pXmlRoot->setAttribute(attrName, attrVal);

 attrName = _T("height");
 attrVal = float(400);
 pXmlRoot->setAttribute(attrName, attrVal);

 attrName = _T("xmlns");
 pXmlRoot->setAttribute(attrName, bstrDefNs);
 
 attrName = _T("xmlns:xlink");
 attrVal = _T("http://www.w3.org/1999/xlink");
 pXmlRoot->setAttribute(attrName, attrVal);

//pXmlRoot 中添加 pNewText 节点
 text = _T("\n\t");
 ptrText = xmlFile->createTextNode(text);
 pXmlRoot->appendChild(ptrText);

 name = _T("家禽");
 IXMLDOMCommentPtr pNewText = xmlFile->createComment(name);
 pXmlRoot->appendChild(pNewText);

//pXmlRoot 中添加 pNewElm节点
 text = _T("\n\t");
 ptrText = xmlFile->createTextNode(text);
 pXmlRoot->appendChild(ptrText);

 name = _T("g");
 nodetype = long(NODE_ELEMENT);
 IXMLDOMElementPtr pNewElm = xmlFile->createNode(nodetype,name,bstrDefNs);
 pXmlRoot->appendChild(pNewElm);

//pNewElm 中添加 text节点
 name = _T("\n\t\t");
 ptrText = xmlFile->createTextNode(name);
 pNewElm->appendChild(ptrText);

 name = _T("text");
 nodetype = long(NODE_ELEMENT);
 IXMLDOMElementPtr pNewGChld = xmlFile->createNode(nodetype,name,bstrDefNs);
 pNewElm->appendChild(pNewGChld);
 name = _T("\n\t");
 ptrText = xmlFile->createTextNode(name);
 pNewElm->appendChild(ptrText);

 attrName = _T("x");
 attrVal = float(20);
 pNewGChld->setAttribute( attrName, attrVal );

 attrName = _T("y");
 attrVal = float(30);
 pNewGChld->setAttribute( attrName, attrVal );

 attrName = _T("fill");
 attrVal = _T("#00007f");
 pNewGChld->setAttribute( attrName, attrVal );

 attrName = _T("font-family");
 attrVal = _T("宋体");
 pNewGChld->setAttribute( attrName, attrVal );

 attrName = _T("font-size");
 attrVal = float(20);
 pNewGChld->setAttribute( attrName, attrVal );

 text = _T("\n\t\t\t你好，鸭子！\n\t\t");
 pNewGChld->put_text( text );

 text = _T("\n");
 ptrText = xmlFile->createTextNode(text);
 pXmlRoot->appendChild(ptrText);

 _variant_t szPath = _T("F:\\VC\\信息子站\\Doc\\代码示例\\SvgDra1.svg");
 hr = xmlFile->save(szPath);
 if( FAILED(hr) )
 {
  OutputXmlErr();
  return;
 }
}