想做檔案複製的動作...but.......(編號:4289)

我想做檔案複製的動作...
but有執行錯誤453
dll進入點SHFileoperationA無法在shell32.dll中找到
可否高人可以指點一下.........感激不盡^_^*
Declare Function SHFileoperation Lib "shell32.dll" Alias "SHFileoperationA" (lpFileOp As SHFILEOPSTRUCT) As Long
Public Type SHFILEOPSTRUCT
hWnd As Long
  wFunc As Long
  pFrom As String
  pTo As String
  fFlags As Integer
  fAborted As Boolean
  hNameMaps As Long
  sProgress As String
End Type

Private Sub Command1_Click()
Dim SHFileOp As SHFILEOPSTRUCT
SHFileOp.wFunc = FO_COPY
    SHFileOp.pFrom = App.Path + ("\thpa.mdb")
    SHFileOp.pTo = App.Path + ("\bakup\0706.mdb")
    SHFileOp.fFlags = FOF_ALLOWUNDO + FOF_NOCONFIRMMKDIR
    SHFileoperation SHFileOp

End Sub