VBA：仅将最后一个(最新)电子邮件附件保存在本地文件夹中

我需要将具有特定主题(最新主题)的最后一封电子邮件的附件保存到本地文件夹中，为此，我在 Outlook 中创建了一个文件夹，并制定了将具有该特定主题的每封电子邮件发送到此文件夹的规则。我已经找到了可以满足我需要的代码，除了它将每个附件保存在电子邮件文件夹中，而不是仅保存了最新附件。这是代码：我该如何修改它以使其满足我的需要？

Sub Test()
   'Arg 1 = Folder name of folder inside your Inbox
   'Arg 2 = File extension, "" is every file
   'Arg 3 = Save folder, "C:\Users\Ron\test" or ""
   '        If you use "" it will create a date/time stamped folder for you in your "Documents" folder
'        Note: If you use this "C:\Users\Ron\test" the folder must exist.

    SaveEmailAttachmentsToFolder "Dependencia Financiera", "xls", "W:\dependencia financiera\test dependencia\"

End Sub

Sub SaveEmailAttachmentsToFolder(OutlookFolderInInbox As String, _
                                 ExtString As String, DestFolder As String)
    Dim ns As NameSpace
    Dim Inbox As MAPIFolder
    Dim SubFolder As MAPIFolder
    Dim Item As Object
    Dim Atmt As Attachment
    Dim FileName As String
    Dim MyDocPath As String
    Dim i As Integer
    Dim wsh As Object
    Dim fs As Object

    On Error GoTo ThisMacro_err

    Set ns = GetNamespace("MAPI")
    Set Inbox = ns.GetDefaultFolder(olFolderInbox)
    Set SubFolder = Inbox.Folders(OutlookFolderInInbox)

    i = 0
    ' Check subfolder for messages and exit of none found
    If SubFolder.Items.Count = 0 Then
        MsgBox "There are no messages in this folder : " & OutlookFolderInInbox, _
               vbInformation, "Nothing Found"
        Set SubFolder = Nothing
        Set Inbox = Nothing
        Set ns = Nothing
        Exit Sub
    End If

    'Create DestFolder if DestFolder = ""
   ' If DestFolder = "" Then
       ' Set wsh = CreateObject("WScript.Shell")
       ' Set fs = CreateObject("Scripting.FileSystemObject")
       ' MyDocPath = wsh.SpecialFolders.Item("mydocuments")
       ' DestFolder = MyDocPath & "\" & Format(Now, "dd-mmm-yyyy hh-mm-ss")
       ' If Not fs.FolderExists(DestFolder) Then
            'fs.CreateFolder DestFolder
       ' End If
    'End If

    'If Right(DestFolder, 1) <> "\" Then
        'DestFolder = DestFolder & "\"
    'End If

    ' Check each message for attachments and extensions
    'JUST BEED TGE FIRST EMAIL
    'Debug.Print Item(1).SentOn

    For Each Item In SubFolder.Items
       For Each Atmt In Item.Attachments
            If LCase(Right(Atmt.FileName, Len(ExtString))) = LCase(ExtString) Then
                FileName = DestFolder & Atmt.FileName
                Atmt.SaveAsFile FileName
                'I = I + 1
            End If
       Next Atmt
   Next Item

    ' Show this message when Finished
   ' If I > 0 Then
       ' MsgBox "You can find the files here : " _
             & DestFolder, vbInformation, "Finished!"
   ' Else
       ' MsgBox "No attached files in your mail.", vbInformation, "Finished!"
   ' End If

    ' Clear memory
ThisMacro_exit:
    Set SubFolder = Nothing
    Set Inbox = Nothing
    Set ns = Nothing
    Set fs = Nothing
    Set wsh = Nothing
    Exit Sub

    ' Error information
ThisMacro_err:
    MsgBox "An unexpected error has occurred." _
         & vbCrLf & "Please note and report the following information." _
         & vbCrLf & "Macro Name: SaveEmailAttachmentsToFolder" _
         & vbCrLf & "Error Number: " & Err.Number _
         & vbCrLf & "Error Description: " & Err.Description _
         , vbCritical, "Error!"
    Resume ThisMacro_exit

End Sub