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不用组件的话有两种办法：

set objFile = CreateObject("SAFRCFileDlg.FileOpen")

Set objShell = CreateObject("Shell.Application")

本blog里都有示例。

如果调用vb组件，可以是:

flag = &h200

whichone = OpenFile("Choose a File!", "C:\", "Everything|*.*|TextFiles|*.TXT|Word-Documents|*.DOC", 2, flag)

MsgBox "Raw data returned: " & whichone

' Split up multi selection result:

' space is used as separator:

whichone = Split(whichone, " ")

' field index 0 contains path information:

path = whichone(0)

' list all the files:

' how many files were selected?

filecount = UBound(whichone)

if filecount=0 then

' just one file selected!

MsgBox "You selected one file: " & whichone(0)

' check status of Read Only checkbox

' is bit 1 set or cleared?

' works only if just one file was selected!

MsgBox "Returned flag: " & flag

if (flag and 1) then

' (flag and 1)<>0, transforms to true

' bit is set!

MsgBox "ReadOnly selected!"

else

MsgBox "ReadOnly not selected!"

end If

' check whether selected file is of default type (txt)

if (flag and 1024) then

MsgBox "selected file is no txt file!"

else

MsgBox "selected file is of default type!"

end if

else

' more than one file selected!

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("MSComDlg.CommonDialog")

comdlg.filter = filter

comdlg.FilterIndex = index

comdlg.Flags = flags

comdlg.MaxFileSize = 260

comdlg.CancelError = false

comdlg.DialogTitle = title

comdlg.InitDir = dir

' set txt as default

comdlg.DefaultExt = "txt"

comdlg.ShowOpen

OpenFile = comdlg.filename

' important: return flag status so your main script can

' check it:

flags = comdlg.Flags

end function