This example checks the DistinctCount property of an Index of a TableDef object opened on a table in the database.
CdbDBEngine dbeng;
CdbDatabase dbsNorthwind;
CdbTableDef tdfCustomers;
CdbIndex idxCurrent;
dbsNorthwind = dbeng.OpenDatabase(_T("Northwind.mdb"));
tdfCustomers = dbsNorthwind.TableDefs[_T("Customers")];
idxCurrent = tdfCustomers.Indexes[0L];
printf(_T(" DistinctCount: %s\n"), idxCurrent.GetDistinctCount());