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how to convert this sub to a UDF

Flora Edwards
Last Modified: 2017-11-27
I had this question after viewing Formula to extract unique string from sheet2 column C.

how to convert this code into UDF

Sub macro()
Set ws2 = Sheets("Sheet2")
lr = ws2.Cells(Rows.Count, 3).End(xlUp).Row

Set Rng = ws2.Range(Range("C2"), ws2.Range("C" & Rows.Count).End(xlUp))
Set dict = CreateObject("Scripting.Dictionary")

For Each c In Rng
    dict(c.Value) = ""
arrKeys = dict.Keys
res = Join(arrKeys, ",")
Sheets("Sheet1").Range("A1") = res
End Sub

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