The Index property returns the index number for this Column object within the Columns collection. Read-only.
objColumn.Index
Long
The Index property indicates this column's position within the parent Columns collection. It can later be used to reselect this column with the collection's Item property.
The first column in the collection has an Index value of 1.
An index value should not be considered a static value that remains constant for the duration of a view. It can be affected when other columns are added and deleted.