无法为使用FrontPage RPC上载到SharePoint的文件设置修改日期

当我使用带有以下代码的FPRC将文件上载到SharePoint以设置vti_timelastmodified时，显示的修改日期始终为当前日期：

 Public Sub UploadSharepointFile(ByVal sSourcePath As String, ByVal sContent As String, ByVal SiteURL As String, ByVal DocName As String, _
                            Optional ByVal sOrigPath As String, Optional ByVal sOrigName As String, _
                            Optional ByVal checkincomment As String, Optional ModDate As Date, Optional FileID As Long)


Dim stream As New ADODB.stream
Dim stream2 As New ADODB.stream
Dim xmlHTTP As New MSXML2.xmlHTTP

    strHeader = "method=put+document%3a12.0.4518.1016" & _
                "&service_name=%2f" & _
                "&document=[document_name=" & Escape(DocName) & _
                ";meta_info=[Original%20Path%3bSW%7c" & Escape(sOrigPath) & _
                ";Original%20Name%3bSW%7c" & Escape(sOrigName) & _
                ";vti_timelastmodified3bTR%7c" & Format(ModDate, "DD+MMM+YYYY+hh:mm:ss") & _
                "]]&put_option=overwrite,createdir,migrationsemantics" & _
                "&comment=" & _
                "&keep%5fchecked%5fout=false" & vbLf

byteArray = StringToByteArray(strHeader)

stream.Open
stream.Type = 1    ''adTypeBinary
stream.Write byteArray


stream2.Open
stream2.Type = 1   'adTypeBinary
stream2.LoadFromFile sSourcePath

stream2.CopyTo stream, -1
stream.Position = 0

'Set xmlHTTP = CreateObject("MSXML2.XMLHTTP")
xmlHTTP.Open "POST", SiteURL + "/_vti_bin/_vti_aut/author.dll", False, UserName, Password
xmlHTTP.setRequestHeader "Content-Type", "application/x-vermeer-urlencoded"
xmlHTTP.setRequestHeader "X-Vermeer-Content-Type", "application/x-vermeer-urlencoded"
xmlHTTP.setRequestHeader "User-Agent", "FrontPage"
xmlHTTP.send stream

如果我将自定义日期字段设置为“Original Modified”，如下所示，则新字段中会显示正确的日期

strHeader = "method=put+document%3a12.0.4518.1016" & _
                "&service_name=%2f" & _
                "&document=[document_name=" & Escape(DocName) & _
                ";meta_info=[Original%20Path%3bSW%7c" & Escape(sOrigPath) & _
                ";Original%20Name%3bSW%7c" & Escape(sOrigName) & _
                ";Original%20Modified%3bTR%7c" & Format(ModDate, "DD+MMM+YYYY+hh:mm:ss") & _
                "]]&put_option=overwrite,createdir,migrationsemantics" & _
                "&comment=" & _
                "&keep%5fchecked%5fout=false" & vbLf
End If

是否有办法将上传时修改的vti_lasttimemodified修改为预设值

西蒙·克拉维斯