Using query Statistics total record of Row on the Form

Sometimes customer want to know how many records in that Form.(include user query or filter condition) .

Well.Such as below X++ Code:

Wrote by Jimmy on April 21th on 2011

display int64 recCount()
{
//this method maybe replace under the datasource method(must be specify datasource) or Form method
    QueryRun                qrCount;
    QueryBuildDataSource    qbsCount;
    DictTable               dictTable;
    DictField               dictField;
    int64                   rowCount;
    Common                  common;
;
    //qrCount     = new QueryRun(this.queryRun().query().pack());//datasource method
    qrCount     = new QueryRun(QVS_POJournalTable_ds.queryRun().query().pack());//Form method or datasource method
    qbsCount    = qrCount.query().dataSourceNo(1);
    dictTable   = new DictTable(qbsCount.table());

    qbsCount.orderMode(orderMode::GroupBy);
    qbsCount.addSelectionField(dictTable.fieldName2Id("RecId"),SelectionField::Count);
    //..... add table relation and one of filtering field

    while (qrCount.next())
    {
        common   = qrCount.getNo(1);
        rowCount = any2int(common.RecId);
    }

    return rowCount;
}