vbs对话框点取消后出现数组越界


flag=&h200
whichone=openfile("choose a file","c:\","Everything|*.*|Text Files|*.txt|Word-Documents|*.DOC",2,flag)
msgbox "raw data returned:"&whichone

whichone=split(whichone," ")
path=whichone(0)
filecount=ubound(whichone)
if filecount=0 then
        msgbox "you selected one file:"&whichone(0)
        msgbox "returned flag:"&flag
        if(flag and 1) then
                msgbox "readonly selected"
        else
                msgbox "readonly not selected"
        end if
        if(flag and 1024) then
                msgbox "selected file is not txt file!"
        else
                msgbox "selected file is of default type!"
        end if
else
        msgbox "you selected "&filecount&" files!"
        for x=1 to ubound(whichone)
                list=list&path&whichone(x)&vbcr
        next
        msgbox list
end if

function openfile(title,dir,filter,index,flags)
        set comdlg=createobject(")
        comdlg.filter=filter
        comdlg.filterindex=index
        comdlg.flags=flags
        comdlg.maxfilesize=260
        comdlg.cancelerror=false
        comdlg.dialogtitle=title
        comdlg.initdir=dir
        comdlg.defaultext="txt"
        comdlg.showopen
        openfile=comdlg.filename
        flags=comdlg.flags
end function

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vbs对话框点取消后出现数组越界

回答 为什么 vbs对话框点取消后出现 数组越界