Adds a new attribute node.
Set notesDOMAttributeNode = notesDOMElementNode.SetAttributeNode( attributeNode )
attributeNode
NotesDOMAttributeNode. The attribute node to add to the attribute list. This object and the calling object must be derived from the same NotesDOMParser object.
notesDOMAttributeNode
NotesDOMAttributeNode. The replaced attribute node.
Returns null if it does not replace an existing attribute.