I am using MSXML 4.0 parser to parse the XML documents in VC++.I can add nodes to the existing document, add attributes to them or modify their attributes.
I whould like to know that how I can add or modify the attributes of the existing nodes.Actually attribute modification requires to have IXMLDOMElement of the node. for new node I can get it through "createElement" method when adding a new node.I want to know how I can get this IXMLNodeElement property for the existing nodes in the XML documant.

You select a node using the selectNode method and passing an XPath, as a string, such as "/myData/myNode" which selects the element named myNode under the document root element of myData. You can also select the atribute directly, if myNode had an attribute named myAtt then "/myData/myNode/@myAtt" ould select it. Suggest you read the examples that came with msxml 4 parser.

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Joe (Microsoft MVP - XML)