我在Excel中有一个带有Treeview控件的小表单。引用包括OLE自动化，Microsoft Forms 2.0，Microsoft Windows Common Controls 6.0（SP6）和Microsoft XML，v6.0我调用LoadTreeViewFromXmlFile，在UserForm_Initialize（）上提供有效的路径和文件名，如：

Call LoadTreeViewFromXmlFile("C:\Users\...\my.xml", TreeView1)

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但我得到一个错误13类型不匹配，在子AddChildrenToTreeView和更具体地在For Each循环.不能理解为什么.有人能告诉我请？非常感谢你提前..

Private Sub LoadTreeViewFromXmlFile(ByVal file_name As String, ByVal trv As TreeView)
    Dim xml_doc As DOMDocument60
    ' Load the XML file into the DOMDocument.
    Set xml_doc = New DOMDocument60
    xml_doc.Load file_name
    ' Add the root node's children to the TreeView.
    TreeView1.Nodes.Clear
    AddChildrenToTreeView trv, Nothing, _
        xml_doc.DocumentElement
End Sub
' Add this XML node's children to the indicated TreeView
' node.
Private Sub AddChildrenToTreeView(ByVal trv As TreeView, ByVal treeview_parent As Node, ByVal xml_node As IXMLDOMElement)
    
    Dim xml_child As IXMLDOMElement
    Dim new_node As Node
    
    ' Examine each XML child. Error 13 Type mismatch - why?
    For Each xml_child In xml_node.ChildNodes
        ' Add the child to the TreeView.
        If treeview_parent Is Nothing Then
            Set new_node = trv.Nodes.Add(, , , _
                xml_child.nodeName)
        Else
            Set new_node = trv.Nodes.Add(treeview_parent, _
                tvwChild, , xml_child.nodeName)
        End If
        new_node.EnsureVisible
        ' Add the child's children.
        AddChildrenToTreeView trv, new_node, xml_child
    Next xml_child
    
End Sub

型