AutoIt with XML: Add a child/grandchild node or remove any node

Sometimes, we have to use AutoIt script to edit an xml, add a node or remove a node, to make some deployment documents fitable to some project.

I have picked up a piece of script function about it as below:

Func append_node($SourceFile)
$objDom = ObjCreate("Microsoft.XMLDOM")
$objDom.load($SourceFile)
$objRoot = $objDom.documentElement.selectSingleNode('//Left')

;Add a child node
$child1 = $objDom.createElement("rootElement")
$child1.text = "Child1"
$child1.setAttribute("Att1Child1","Child1_TextAtt1")
$objRoot.appendChild($child1)

;Add a grandchild node
$objChild1 = $objDom.createElement("childElement1")
$objChild1.text = "objChild1"
$objChild1.setAttribute("Att1ObjChild1","obj_Child1_TextAtt1")
$child1.appendChild($objChild1)

;Add a grandchild node
$objChild2 = $objDom.createElement("childElement2")
$objChild2.text = "objChild2"
$objChild2.setAttribute("Att2ObjChild2","obj_Child2_TextAtt21")
$child1.appendChild($objChild2)

$objDom.save($SourceFile)
EndFunc

Func remove_node($SourceFile)
$oXML = ObjCreate("Microsoft.XMLDOM")
$oXML.Load($SourceFile)
$oNode = $oXML.documentElement.selectSingleNode('//Left')
;$oNode.parentNode.removeChild($oNode)
$remove_node = $oXML.documentElement.selectSingleNode('//Left/NewChild1')
;Remove the child node
$oNode.removeChild($remove_node)
$oXML.save($SourceFile)
EndFunc

$SourceFile = "STRPControl.xml"
append_node($SourceFile)