Restituisce the classic XLS AutoFilter field collection for the worksheet. Read-only
La raccolta usa indici di campo in base 1 corrispondenti alle colonne AutoFilter visibili. Count returns the number of filtered columns in the current range. Items[Field] e Find(Field) return a TXLSAutofilterItem for that field o nil when the field index is outside the current range
Each item exposes Active, Operator, Criteria1, e Criteria2. Criteria objects expose the stored BIFF8 DOPER DataType, grbitSgn, e Value