VBScript压缩单个文件

On Error Resume Next
Dim fso,fp,oApp,targetfile
Set fso=CreateObject("Scripting.FileSystemObject")
targetfile="D:\tmp.zip"
Set fp=fso.OpenTextFile(targetfile,2,True)
fp.Write Chr(80) & Chr(75) & Chr(5) & Chr(6) & String(18,0)
fp.Close
Set oApp=CreateObject("Shell.Application")
Set fso=Nothing
Err.Clear
oApp.Namespace(targetfile).CopyHere "C:\1.txt"
WScript.Sleep 1000