QueryBuildDynaLink Class

Today I will demonstrate you that how to use QueryBuildDynaLink Class in AX.{
Query query = new Query();
QueryBuildDataSource custTableQBDS;
QueryBuildDynalink qbdl;
QueryRun qr;
CustTable custTable;
CustTrans custTrans;
custTableQBDS = query.addDataSource(tablenum(custTable));
select firstonly custTrans where custtrans.Voucher == 'SIV-100015';
custTableQBDS.addDynalink(fieldNum(CustTable, AccountNum), custTrans, fieldNum(custTrans,AccountNum));
qr = new QueryRun(query);
while (qr.next())
{
custTable = qr.get(tableNum(CustTable));
setPrefix( 'Customer – ' + custTable.AccountNum);
info(custTable.CustGroup);
info(custTrans.Voucher);
}
}