Function to convert column number to letter?

Question

Does anyone have an Excel VBA function which can return the column letter(s) from a number?

For example, entering 100 should return CV.

Answer 1

This is a version of robartsd's answer (with the flavor of Jan Wijninckx's one line solution), using recursion instead of a loop.

Public Function ColumnLetter(Column As Integer) As String
    If Column < 1 Then Exit Function
    ColumnLetter = ColumnLetter(Int((Column - 1) / 26)) & Chr(((Column - 1) Mod 26) + Asc("A"))
End Function

I've tested this with the following inputs:

1   => "A"
26  => "Z"
27  => "AA"
51  => "AY"
702 => "ZZ"
703 => "AAA" 
-1  => ""
-234=> ""