If you Need a Filter In a Form

//Add this to Class Declaration of a Form
public class FormRun extends ObjectRun
{
       QueryBuildRange rangeTenant;
       QueryBuildRange rangeAgreementId;
       QueryBuildRange rangeAgreementJournalId;
       QueryBuildRange rangeBuildingId;
       QueryBuildRange rangeRentTransId;
       QueryBuildRange rangePaymentDate;
       QueryBuildRange qbr,qbr1,qbr2,qbr3;

}
//Add this to Datasource Execute Query(Eg :- NetPaymentHistory_ds)
public void executeQuery()
{

      rangeTenant.value(TenantId.text() ? queryValue(TenantId.text()) 
              :SysQuery::valueUnlimited());
      rangeAgreementId.value(AgreementId.text() ? queryValue(AgreementId.text())
              : SysQuery::valueUnlimited());
      rangeAgreementJournalId.value(AgreementJournalId.text() ? queryValue(AgreementJournalId.text()) 
             : SysQuery::valueUnlimited());
      rangeBuildingId.value(BuildingId.text() ? queryValue(BuildingId.text())
            : SysQuery::valueUnlimited());
      rangeRentTransId.value(RentTransId.text() ? queryValue(RentTransId.text()) 
            : SysQuery::valueUnlimited());
      rangePaymentDate.value(PaymentDate.valueStr() ? queryValue(PaymentDate.valueStr())
            : SysQuery::valueUnlimited());

       super();
}
//Add this to Datasource init method (Eg :- NetPaymentHistory_ds)

public void init()
{

       super();

      this.query().dataSourceTable(tablenum(NetPaymentHistory)).clearDynalinks();

      rangeTenant = this.query().dataSourceTable(tablenum(NetPaymentHistory))
               .addRange(fieldnum(NetPaymentHistory, TenantId));
      rangeAgreementId = this.query().dataSourceTable(tablenum(NetPaymentHistory))
               .addRange(fieldnum(NetPaymentHistory, AgreementId));
      rangeAgreementJournalId = this.query().dataSourceTable(tablenum(NetPaymentHistory))
              .addRange(fieldnum(NetPaymentHistory, AgreementJournalID));
      rangeBuildingId = this.query().dataSourceTable(tablenum(NetPaymentHistory))
              .addRange(fieldnum(NetPaymentHistory, BuildingId));
      rangeRentTransId = this.query().dataSourceTable(tablenum(NetPaymentHistory))
             .addRange(fieldnum(NetPaymentHistory, RentTransId));
      rangePaymentDate = this.query().dataSourceTable(tablenum(NetPaymentHistory))
            .addRange(fieldnum(NetPaymentHistory, PaymentDate));
     // Enable caching of the document handling and note it display fields
    //purchRFQTable_ds.cacheAddMethod(tablemethodstr(PurchRFQTable, showDocHandIcon));

}
// Add this to Each of the String Control Field
public boolean modified()
{
     boolean ret;

    ret = super();

    NetPaymentHistory_ds.executeQuery();

    return ret;
}