xslt transformation in vba

Question

I am trying to generate an xml from a set of xpaths. This is related to Generating XML from xpath using xslt

I found a XSLT that may solve my problem in this answer to another question

<xsl:stylesheet version="2.0"
     xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:xs="http://www.w3.org/2001/XMLSchema"
     xmlns:my="my:my">
     <xsl:output omit-xml-declaration="yes" indent="yes"/>

     <xsl:key name="kNSFor" match="namespace" use="@of"/>
     <xsl:variable name="vStylesheet" select="document('')"/>

     <xsl:variable name="vPop" as="element()*">
        <item path="/create/article/@type">richtext</item>
        <item path="/create/article/@lang">en-us</item>
        <item path="/create/article[1]/id">1</item>
        <item path="/create/article[1]/description">bar</item>
        <item path="/create/article[1]/name[1]">foo</item>
        <item path="/create/article[1]/price[1]/amount">00.00</item>
        <item path="/create/article[1]/price[1]/currency">USD</item>
        <item path="/create/article[1]/price[2]/amount">11.11</item>
        <item path="/create/article[1]/price[2]/currency">AUD</item>
        <item path="/create/article[2]/id">2</item>
        <item path="/create/article[2]/description">some name</item>
        <item path="/create/article[2]/name[1]">some description</item>
        <item path="/create/article[2]/price[1]/amount">00.01</item>
        <item path="/create/article[2]/price[1]/currency">USD</item>

        <namespace of="create" prefix="ns1:"
                   url="http://predic8.com/wsdl/material/ArticleService/1/"/>
        <namespace of="article" prefix="ns1:"
                   url="xmlns:ns1='http://predic8.com/material/1/"/>
        <namespace of="@lang" prefix="xml:"
                   url="http://www.w3.org/XML/1998/namespace"/>
        <namespace of="price" prefix="ns1:"
                   url="xmlns:ns1='http://predic8.com/material/1/"/>
        <namespace of="id" prefix="ns1:"
                   url="xmlns:ns1='http://predic8.com/material/1/"/>
     </xsl:variable>

     <xsl:template match="/">
      <xsl:sequence select="my:subTree($vPop/@path/concat(.,'/',string(..)))"/>
     </xsl:template>

     <xsl:function name="my:subTree" as="node()*">
      <xsl:param name="pPaths" as="xs:string*"/>

      <xsl:for-each-group select="$pPaths" group-adjacent=
            "substring-before(substring-after(concat(., '/'), '/'), '/')">
        <xsl:if test="current-grouping-key()">
         <xsl:choose>
           <xsl:when test=
              "substring-after(current-group()[1], current-grouping-key())">

             <xsl:variable name="vLocal-name" select=
              "substring-before(concat(current-grouping-key(), '['), '[')"/>

             <xsl:variable name="vNamespace"
                           select="key('kNSFor', $vLocal-name, $vStylesheet)"/>


             <xsl:choose>
              <xsl:when test="starts-with($vLocal-name, '@')">
               <xsl:attribute name=
                 "{$vNamespace/@prefix}{substring($vLocal-name,2)}"
                    namespace="{$vNamespace/@url}">
                 <xsl:value-of select=
                  "substring(
                       substring-after(current-group(), current-grouping-key()),
                       2
                             )"/>
               </xsl:attribute>
              </xsl:when>
              <xsl:otherwise>
               <xsl:element name="{$vNamespace/@prefix}{$vLocal-name}"
                          namespace="{$vNamespace/@url}">

                    <xsl:sequence select=
                     "my:subTree(for $s in current-group()
                                  return
                                     concat('/',substring-after(substring($s, 2),'/'))
                                   )
                     "/>
                 </xsl:element>
              </xsl:otherwise>
             </xsl:choose>
           </xsl:when>
           <xsl:otherwise>
            <xsl:value-of select="current-grouping-key()"/>
           </xsl:otherwise>
         </xsl:choose>
         </xsl:if>
      </xsl:for-each-group>
     </xsl:function>
</xsl:stylesheet>

I am trying to transform this in VBA using code from http://www.oreillynet.com/xml/blog/2005/04/transforming_xml_in_microsoft.html

I got an error

Private Sub Transform(sourceFile, stylesheetFile, resultFile)

    Dim source As New MSXML2.DOMDocument30
    Dim stylesheet As New MSXML2.DOMDocument30
    Dim result As New MSXML2.DOMDocument30

    ' Load data.
    source.async = False
    source.Load sourceFile

    ' Load style sheet.
    stylesheet.async = False
    stylesheet.Load stylesheetFile

    If (source.parseError.ErrorCode <> 0) Then
       MsgBox ("Error loading source document: " & source.parseError.reason)
    Else
        If (stylesheet.parseError.ErrorCode <> 0) Then
            MsgBox ("Error loading stylesheet document: " & stylesheet.parseError.reason)
        Else
            ' Do the transform.
            source.transformNodeToObject stylesheet, result
            result.Save resultFile
        End If
    End If

End Sub

I also tried to use transformNode instead to transformNodeToObject. I got

object doesn't support this property or method

Private Sub Transform(sourceFile, stylesheetFile, resultFile)
    Dim source As New MSXML2.DOMDocument60
    Dim stylesheet As New MSXML2.DOMDocument60
    Dim result As New MSXML2.DOMDocument60

    ' Load data
    source.async = False
    source.Load sourceFile

    ' Load style sheet.
    stylesheet.async = False
    stylesheet.Load stylesheetFile

    If (source.parseError.ErrorCode <> 0) Then
       MsgBox ("Error loading source document: " & source.parseError.reason)
       Else
    If (stylesheet.parseError.ErrorCode <> 0) Then
          MsgBox ("Error loading stylesheet document: " & stylesheet.parseError.reason)
       Else
          ' Do the transform.
          source.transformNode (stylesheet)
          'result.Save resultFile
    End If
    End If
End Sub