var xmlhttp = new ActiveXObject("Msxml2.ServerXMLHTTP.6.0"); xmlhttp.open("POST", "https://api.example.com/service", false); xmlhttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8"); var soapXml = "<soap:Envelope>...</soap:Envelope>"; xmlhttp.send(soapXml); var response = xmlhttp.responseXML; var result = response.selectSingleNode("//Result").text; This works unchanged from Windows XP to Windows 11, demonstrating MSXML’s long-term compatibility guarantee. | Feature | Availability | |---------|--------------| | DOM Parser | ✅ Full | | SAX2 Parser | ✅ Full | | XSLT 1.0 | ✅ Full | | XPath 1.0 | ✅ Full | | XSD Validation | ✅ Full | | HTTP XML requests | ✅ XMLHTTP, ServerXMLHTTP | | 64-bit support | ✅ Yes | | Security mitigations | ✅ ASLR, DEP, CFG, zone lockdown | | Modern app support (UWP, WinUI) | ❌ No | | JSON support | ❌ No | | XSLT 2.0+ | ❌ No | | XPath 2.0+ | ❌ No | This feature document confirms that while MSXML is not a modern XML library , it remains a reliable, secure, and functional legacy component on Windows 11 for maintaining backward compatibility in enterprise environments.