c++ builder XE4, 10.2 Tokyo > TeeChart > Series1に10個ずつデータを追加する

C++ builder XE4
    TeeChart Lite v2013.08.130414
RAD Studio 10.2 Tokyo Update 2 (追記 2018/01/10)
    TeeChart v2016.17.160129 32bit VCL

void __fastcall TForm1::B_addClick(TObject *Sender)
{
    TDateTime lastDt = Series1->XValues->Last();

    TDateTime workDt = IncSecond(lastDt, 1);
    double dval;
    for (int idx=0; idx < 10; idx++) {
        dval = (double)random(60);
        Series1->AddXY(workDt, dval, L"", clRed);
        workDt = IncSecond(workDt, 1);
    }
}