MSXML2

The following C/C++ example creates and appends a new text node to the root document element.

#import "msxml3.dll"
using namespace MSXML2;

inline void TESTHR( HRESULT _hr ) 
   { if FAILED(_hr) throw(_hr); }


void XMLDOMText()
{
   try {
      IXMLDOMDocumentPtr docPtr;
      IXMLDOMNodePtr DOMNodePtr;
      IXMLDOMNamedNodeMapPtr DOMNamedNodeMapPtr;

      //init
      TESTHR(CoInitialize(NULL)); 
      TESTHR(docPtr.CreateInstance("msxml2.domdocument"));
      
      // load a document
      _variant_t varXml("C:\\book.xml");
      _variant_t varOut((bool)TRUE);
      varOut = docPtr->load(varXml);
      if ((bool)varOut == FALSE)
         throw(0);
      
      DOMNodePtr = docPtr->createTextNode("Hello World");

      docPtr->documentElement->appendChild(DOMNodePtr);

      MessageBox(NULL, _bstr_t(docPtr->xml), _T("New Document"), MB_OK);

   } catch(...)
   {
      MessageBox(NULL, _T("Exception occurred"), _T("Error"), MB_OK);
   }
   CoUninitialize();
}