C / C++ / MFC

CString sInputPath;// valid input path initialized.
sInputPath+= "StyleSheet.xsl";

MSXML2::IXMLDOMDocument2Ptr pXMLDocResult;
CMtXmlParser xlsParser; // our own XML parser.
xlsParser.InitDoc();


VARIANT_BOOL vResult = xmlParser.LoadDocument(sInputPath);
if( ((BOOL)vResult ) == false ) // fail!
{
  // if cannot load the XLS file, just save as-is.
  hr = xmlParser.SaveDocument( sPath );
  return FAILED( hr );
}

MSXML2::IXMLDOMDocument2Ptr pXslStyleSheet;
pXslStyleSheet = xmlParser.GetDOMDocument();

hr = CoCreateInstance( MSXML2::CLSID_DOMDocument40, NULL, CLSCTX_INPROC_SERVER,  MSXML2::IID_IXMLDOMDocument2, (void**)&pXMLDocResult);
ASSERT( !FAILED(hr));


IDispatch* pDispatch;
hr = pXMLDocResult->QueryInterface(IID_IDispatch, (void**)&pDispatch);
ASSERT( !FAILED(hr));

VARIANT vOutput;
vOutput.vt = VT_DISPATCH;
vOutput.pdispVal = pDispatch;

try
{
  // Apply transform to doc before saving ...
  HRESULT hr = pXMLDoc->transformNodeToObject( pXslStyleSheet, vOutput );
  ASSERT( !FAILED(hr));
}
catch ( ... )
{
  // if cannot transform, just save as-is.
  hr = xmlParser.SaveDocument( sPath );
  return FAILED( hr );
}

BSTR s = xmlParser.AsciiToBSTR(sPath );
hr = pXMLDocResult->save(s);
ASSERT(!FAILED(hr));

<xsl:stylesheet version="1.0">
  <xsl:output method="xml" indent="yes"/>
  <xsl:template match="@* | node()">
    <xsl:copy>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>