How can I get the Column Name as integer Value?

Question

I have 4 header columns in an Excel Workbook ,example  :
CustomerID   Account Name   Date   Name
 
How do I read back the only Column #...... Example CustomerID is column "1", Account Name is "2",  Date is "3"
I do not want the cell references e.g. A1, B1,C1
Can someone tell me how to get the number value of the Column position?
thanks
J