Excel VBA: search column number by certain cell's value

Hello!

I have Worksheet with headers and data.

Header (1st row):
A1: actv_code_type_id
B1: actv_short_len
C1: seq_num
D1: actv_code_type
E1: proj_id
F1: wbs_id
G1: actv_code_type_scope

2st and following rows contants various date.

What I need: find certain string in header's row and get column number.

Yes, of course, I can make loop  for examine each column in first row:

Function getFieldColumn(s As Worksheet, ByVal sName As String) As Integer
Dim iCol As Integer
    iCol = 1
    While s.Cells(1, iCol) <> ""
        If UCase(s.Cells(1, iCol)) = UCase(sName) Then
            getFieldColumn = iCol
            Exit Function
        End If
        iCol = iCol + 1
    Wend
End Function

... but maybe there is better (more intelligent and elegant) way?

Thanks!