Get value from closed workbook Excel 2010

Hello,

I was using this code to get value from closed workbook in excel 2003. Now my company upgraded to office 2010 and it is not working any more. Is there a way to adjust the code to suit new software or replace with some other commands? I also tried MoreFunctions add-on to use better INDIRECT formula, but it seems it doesn't work with 2010 excel as well. Thanks you for you help in advance. Here is my code:

Sub CommandButton1_Click()
    p = "D:\User\"
    f = "ABC.xlsx"
    s = "Sheet1"
    a = "A1"
    Range("A2") = GetValue(p, f, s, a)
End Sub

Private Function GetValue(path, file, sheet, ref)
'   Retrieves a value from a closed workbook
    Dim arg As String
'   Make sure the file exists
    If Right(path, 1) <> "\" Then path = path & "\"
    If Dir(path & file) = "" Then
        GetValue = "File Not Found"
        Exit Function
    End If
'   Create the argument
    arg = "'" & path & "[" & file & "]" & sheet & "'!" & _
      Range(ref).Range("A1").Address(, , xlR1C1)
'   Execute an XLM macro
    GetValue = ExecuteExcel4Macro(arg)
End Function

Any suggestions with this issue? Is it possible or maybe not?