QueryRun using index

Is there a way to tell the queryrun to use an index?

QueryRun qr;

query q = new Query();

QueryBuildDataSource ds = q.AddDataSource(tableNum(CustTable));

CustTable ct;

;

ds.firstFast(false);

qr = new QueryRun (q);

// ADD force index here

while (qr.next())

{

ct = qr.getNo(1);

}

Isn’t it answered in Index hint in Query object?