Declaration
property Tag: NativeInt;
Description
An integer value that you can use for your own purposes.
procedure TfrmMain.ievMainLayerNotifyEx(Sender: TObject; layer: Integer; event: TIELayerEvent);
begin
// Assign date to each layer
if event = ielCreated then
ievMain.Layers[layer].Tag := Trunc( now );
end;