帮忙注释一下upload_5xsoft.inc和uploadphoto.asp这个文件下的代码,有愿意指导我的高手请留下ＱＱ，在线等，急！！！拜托了
upload_5xsoft.inc:
<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
dim Data_5xsoft

Class upload_5xsoft
  
dim objForm,objFile,Version

Public function Form(strForm)
   strForm=lcase(strForm)
   if not objForm.exists(strForm) then
     Form=""
   else
     Form=objForm(strForm)
   end if
 end function

Public function File(strFile)
   strFile=lcase(strFile)
   if not objFile.exists(strFile) then
     set File=new FileInfo
   else
     set File=objFile(strFile)
   end if
 end function


Private Sub Class_Initialize 
  dim RequestData,sStart,vbCrlf,sInfo,iInfoStart,iInfoEnd,tStream,iStart,theFile
  dim iFileSize,sFilePath,sFileType,sFormValue,sFileName
  dim iFindStart,iFindEnd
  dim iFormStart,iFormEnd,sFormName
  Version="化境HTTP上传程序 Version 2.0"
  set objForm=Server.CreateObject("Scripting.Dictionary")
  set objFile=Server.CreateObject("Scripting.Dictionary")
  if Request.TotalBytes<1 then Exit Sub
  set tStream = Server.CreateObject("adodb.stream")
  set Data_5xsoft = Server.CreateObject("adodb.stream")
  Data_5xsoft.Type = 1
  Data_5xsoft.Mode =3
  Data_5xsoft.Open
  Data_5xsoft.Write  Request.BinaryRead(Request.TotalBytes)
  Data_5xsoft.Position=0
  RequestData =Data_5xsoft.Read 

  iFormStart = 1
  iFormEnd = LenB(RequestData)
  vbCrlf = chrB(13) & chrB(10)
  sStart = MidB(RequestData,1, InStrB(iFormStart,RequestData,vbCrlf)-1)
  iStart = LenB (sStart)
  iFormStart=iFormStart+iStart+1
  while (iFormStart + 10) < iFormEnd 
    iInfoEnd = InStrB(iFormStart,RequestData,vbCrlf & vbCrlf)+3
    tStream.Type = 1
    tStream.Mode =3
    tStream.Open
    Data_5xsoft.Position = iFormStart
    Data_5xsoft.CopyTo tStream,iInfoEnd-iFormStart
    tStream.Position = 0
    tStream.Type = 2
    tStream.Charset ="gb2312"
    sInfo = tStream.ReadText
    tStream.Close
    '取得表单项目名称
    iFormStart = InStrB(iInfoEnd,RequestData,sStart)
    iFindStart = InStr(22,sInfo,"name=""",1)+6
    iFindEnd = InStr(iFindStart,sInfo,"""",1)
    sFormName = lcase(Mid (sinfo,iFindStart,iFindEnd-iFindStart))
    '如果是文件
    if InStr (45,sInfo,"filename=""",1) > 0 then
        set theFile=new FileInfo
        '取得文件名
        iFindStart = InStr(iFindEnd,sInfo,"filename=""",1)+10
        iFindEnd = InStr(iFindStart,sInfo,"""",1)
        sFileName = Mid (sinfo,iFindStart,iFindEnd-iFindStart)
        theFile.FileName=getFileName(sFileName)
        theFile.FilePath=getFilePath(sFileName)
        '取得文件类型
        iFindStart = InStr(iFindEnd,sInfo,"Content-Type: ",1)+14
        iFindEnd = InStr(iFindStart,sInfo,vbCr)
        theFile.FileType =Mid (sinfo,iFindStart,iFindEnd-iFindStart)
        theFile.FileStart =iInfoEnd
        theFile.FileSize = iFormStart -iInfoEnd -3
        theFile.FormName=sFormName
        if not objFile.Exists(sFormName) then
          objFile.add sFormName,theFile
        end if
    else
    '如果是表单项目
        tStream.Type =1
        tStream.Mode =3
        tStream.Open
        Data_5xsoft.Position = iInfoEnd 
        Data_5xsoft.CopyTo tStream,iFormStart-iInfoEnd-3
        tStream.Position = 0
        tStream.Type = 2
        tStream.Charset ="gb2312"
            sFormValue = tStream.ReadText 
            tStream.Close
        if objForm.Exists(sFormName) then
          objForm(sFormName)=objForm(sFormName)&", "&sFormValue          
        else
          objForm.Add sFormName,sFormValue
        end if
    end if
    iFormStart=iFormStart+iStart+1
    wend
  RequestData=""
  set tStream =nothing
End Sub

Private Sub Class_Terminate  
 if Request.TotalBytes>0 then
    objForm.RemoveAll
    objFile.RemoveAll
    set objForm=nothing
    set objFile=nothing
    Data_5xsoft.Close
    set Data_5xsoft =nothing
 end if
End Sub
   
 
 Private function GetFilePath(FullPath)
  If FullPath <> "" Then
   GetFilePath = left(FullPath,InStrRev(FullPath, "\"))
  Else
   GetFilePath = ""
  End If
 End  function
 
 Private function GetFileName(FullPath)
  If FullPath <> "" Then
   GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
  Else
   GetFileName = ""
  End If
 End  function
End Class

Class FileInfo
  dim FormName,FileName,FilePath,FileSize,FileType,FileStart
  Private Sub Class_Initialize 
    FileName = ""
    FilePath = ""
    FileSize = 0
    FileStart= 0
    FormName = ""
    FileType = ""
  End Sub
  
 Public function SaveAs(FullPath)
    dim dr,ErrorChar,i
    SaveAs=true
    if trim(fullpath)="" or FileStart=0 or FileName="" or right(fullpath,1)="/" then exit function
    set dr=CreateObject("Adodb.Stream")
    dr.Mode=3
    dr.Type=1
    dr.Open
    Data_5xsoft.position=FileStart
    Data_5xsoft.copyto dr,FileSize
    dr.SaveToFile FullPath,2
    dr.Close
    set dr=nothing 
    SaveAs=false
  end function
  End Class
</SCRIPT>