uses
  ComObj;

// Compact and repair an access database, it requires exclusive db access.
// argument DB = Path to Access Database
function CompactAndRepair(DB: string) : boolean;
var
  v: OLEvariant;
begin { CompactAndRepair }
  Result := True;
  try
    v := CreateOLEObject('JRO.JetEngine');
    try
      v.CompactDatabase('Provider=Microsoft.Jet.OLEDB.4.0;Data Source=' + DB,
                        'Provider=Microsoft.Jet.OLEDB.4.0;Data Source=' + DB +
                        'x;Jet OLEDB:Engine type=5');
      DeleteFile(DB);
      RenameFile(DB + 'x', DB)
    finally
      v := Unassigned
    end; { try }

  except
    Result := False
  end; { try }
end; { CompactAndRepair }