pugi::xml_document doc; pugi::xml_parse_result result = doc.load_file("myfile.xml"); if (!result) { std::cout << "Error description: " << result.description() << std::endl; }In this example, the `load_file` function is used to parse an XML file named "myfile.xml" into a pugixml document. If there is an error parsing the document, the `xml_parse_result` object `result` will hold the error message, which can be retrieved using the `description` function of the object. The pugixml library is a lightweight, header-only XML parsing library for C++. It provides a simple and efficient API for parsing XML documents, and supports XPath queries and modifications of the parsed document.