Function DeleteLog( )
    Dim objFSO, objFolder, strPath, targetFSO, subFSO, DirPath  
    DirPath = createobject("Scripting.FileSystemObject").GetFile(Wscript.ScriptFullName).ParentFolder.Path&"\Log\"
    Set objFSO = CreateObject("Scripting.FileSystemObject")
    Set targetFSO =  objFSO.GetFolder(DirPath)
    Set subFSO = targetFSO.SubFolders

    For Each subFolder in SubFSO
If DateDiff("d", subFolder.name, date)>3 Then
    strPath = DirPath&subFolder.name
    objFSO.DeleteFolder(strPath)
    End If
    Next
End Function
Call DeleteLog( )
这样在task Schdeuler里面schedule我的vbs程序就没有报错啦。撒花，结贴~~

Dim dqxs, dqrq, szxs, szfz, dqml, datp
Dim jclb
Dim c
dim d
'=========================================================
datp = "F:"
szxs = "7:00:"
wjml = datp & "\DVRDat\"
sykj = 20000000000 '20个G
dqml = left(wscript.scriptfullname,instrrev(wscript.scriptfullname,"\")-1)
jclb = "ServicesManager.exe,PD_Server.exe,SpeedServer.exe,CoreServer.exe,DownloadSVC.exe,ManagerConsole.exe,Gptsvr.exe,HintAMProxy.exe,FileServer.exe,CleanDisk.exe,GetNetData.exe,SGUClient.exe,SGUServer.exe,"
set WshShell = WScript.CreateObject("WScript.Shell")
Set fso = Wscript.CreateObject("Scripting.FileSystemObject")
'=========================================================
if fso.GetDrive(datp).FreeSpace < sykj then call cprlql
do
    If InStr(time, szxs) <> 0 Then
        if fso.GetDrive(datp).FreeSpace < sykj then call cprlql
    end if
    WScript.Sleep(60*1000)
loop

getfso=fso.GetFolder("c:\\windows").DateCreated
'===========================================================
Function cprlql
    Dim strline, scml
    WshShell.run "cmd /c dir " & wjml &" /ad /b /tc>c:\dir.log",0
    if fso.FileExists("c:\dir.log") then
        Set objFile = fso.OpenTextFile("c:\dir.log")                
        do until objFile.atendofstream
            strline = objFile.readline
            scml = wjml & strline
            WshShell.run "cmd /c rd /s /q " & scml,0
            for i = 1 to 20
                if fso.GetDrive(datp).FreeSpace > sykj then exit Function
                if fso.FolderExists(scml) then
                    WScript.Sleep(1000)
                else
                    exit for
                end if
            next
            if fso.GetDrive(datp).FreeSpace > sykj then exit Function
        loop
    end if
End Function