UDF - How to turn a string that contains a path, workbook name, worksheet name and cell reference into a formula? [duplicate]

Answer 1

You can't use a UDF to insert a formula. I'm afraid you'll have to use an XLM macro to reference a range in a closed file. I found this information HERE

So in practice:

My testfile value:

The somewhat edited code:

Private Function GetValue(path, file, sheet, ref)

Dim arg As String
If Right(path, 1) <> "\" Then path = path & "\"
If Dir(path & file) = "" Then
    GetValue = "File Not Found"
    Exit Function
End If
arg = "'" & path & "[" & file & "]" & sheet & "'!" & Range(ref).Range("A1").Address(, , xlR1C1)
GetValue = ExecuteExcel4Macro(arg)

End Function

Sub TestGetValue()

With ActiveWorkbook.Sheets(1)
    path = .Cells(1, 3)
    file = .Cells(2, 3)
    sheet = .Cells(3, 3)
    ref = .Cells(4, 3)
    .Cells(1, 1) = GetValue(path, file, sheet, ref)
End With

End Sub

Use a button and assign macro to run on click