vbs实现unicode和ascii编码转换

' Utility to rewrite a Unicode text file as an ANSI text file
' For use with Windows Scripting Host, CScript.exe or WScript.exe
' Copyright (c) 1999, Microsoft Corporation
'
Option Explicit

' FileSystemObject.CreateTextFile and FileSystemObject.OpenTextFile
Const OpenAsASCII   = 0
Const OpenAsUnicode = -1

' FileSystemObject.CreateTextFile
Const OverwriteIfExist = -1
Const FailIfExist      = 0

' FileSystemObject.OpenTextFile
Const OpenAsDefault    = -2
Const CreateIfNotExist = -1
Const FailIfNotExist   = 0
Const ForReading = 1
Const ForWriting = 2
Const ForAppending = 8

Dim argCount:argCount = Wscript.Arguments.Count
If argCount > 0 Then If InStr(1, Wscript.Arguments(0), "?", vbTextCompare) > 0 Then argCount = 0
If (argCount = 0) Then
    Wscript.Echo "Utility to copy Unicode text file to an ANSI text file." &_
        vbNewLine & "The 1st argument is the Unicode text file to read" &_
        vbNewLine & "The 2nd argument is the ANSI text file to write" &_
        vbNewLine & "If the 2nd argument is omitted, the Unicode file will be replaced"
    Wscript.Quit 1
End If

Dim inFile, outFile, inStream, outStream, inLine, FileSys, WshShell
If argCount > 1 Then
    outFile = Wscript.Arguments(1)
    inFile  = Wscript.Arguments(0)
Else
    outFile = Wscript.Arguments(0)
    inFile  = outFile & ".tmp"
    Set WshShell = Wscript.CreateObject("Wscript.Shell")
    WshShell.Run "cmd.exe /c copy " & outFile & " " & inFile, 0, True
End If

Set FileSys = CreateObject("Scripting.FileSystemObject")
Set inStream  = FileSys.OpenTextFile(inFile, ForReading, FailIfNotExist, OpenAsDefault)
Set outStream = FileSys.CreateTextFile(outFile, OverwriteIfExist, OpenAsASCII)
Do
    inLine = inStream.ReadLine
    outStream.WriteLine inLine
Loop Until inStream.AtEndOfStream
inStream.Close
outStream.Close
If argCount = 1 Then WshShell.Run "cmd.exe /c del " & inFile, 0