ecco il codice....mi potete dire come effettuare le correzioni????????????

avvio è il pulsante
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Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long

Private Sub avvio_Click()

OpenFile Me.hwnd, "C:\uno.xls"

End Sub