Lookup and Query Range

public void lookupHCMtable(FormStringControl _ctrl)
{
    SysTableLookup              sysTableLookup = SysTableLookup::newParameters(tablenum(hcmtable), _ctrl);
    Query                       query = new Query();
    QueryBuildDataSource        queryBuildDataSource;
    QueryBuildRange             queryBuildRange;
    ;
    sysTableLookup.addLookupfield(fieldnum(hcmtable, EmpId));
    sysTableLookup.addLookupfield(fieldnum(hcmtable, EmpName));
    queryBuildDataSource = query.addDataSource(tablenum(hcmtable));
    queryBuildRange = queryBuildDataSource.addRange(fieldnum(hcmtable, Lastdateworked));
    queryBuildRange.value(strFmt('(Lastdateworked > %1)', today()));
    sysTableLookup.parmQuery(query);
    sysTableLookup.performFormLookup();
}