'例： CommonFileOpenSave(, , "所有文件(*.*)" & Chr(0) & "*.*" & Chr(0))
Option Compare Database
Option Explicit
Type tagOPENFILENAME
    lStructSize    As Long
    hwndOwner  As Long
    hInstance  As Long
    strFilter  As String
    strCustomFilter As String
    nMaxCustFilter As Long
    nFilterIndex As Long
    strFile    As String
    nMaxFile   As Long
    strFileTitle As String
    nMaxFileTitle As Long
    strInitialDir As String
    strTitle   As String
    flags      As Long
    nFileOffset As Integer
    nFileExtension As Integer
    strDefExt  As String
    lCustData  As Long
    lpfnHook   As Long
    lpTemplateName As String
End Type
Private Declare Function apiGetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (ofn As tagOPENFILENAME) As Boolean
Private Declare Function apiGetSaveFileName Lib "comdlg32.dll" Alias "GetSaveFileNameA" (ofn As tagOPENFILENAME) As Boolean
Public Function CommonFileOpenSave( _
                                   Optional ByRef flags As Variant, _
                                   Optional ByVal InitialDir As Variant, _
                                   Optional ByVal Filter As Variant, _
                                   Optional ByVal FilterIndex As Variant, _
                                   Optional ByVal DefaultExt As Variant, _
                                   Optional ByVal Filename As Variant, _
                                   Optional ByVal DialogTitle As Variant, _
                                   Optional ByVal hwnd As Variant, _
                                   Optional ByVal OpenFile As Variant) As Variant

Dim ofn        As tagOPENFILENAME
Dim strFilename As