Relation Custtable and CustInvoiceJour in x++

Relation Custtable and CustInvoiceJour in x++ :

select _CustTable where _CustTable.AccountNum == CustInvoiceJour.SalesId;

.:: Atau methode ini sudah disediakan di table CustInvoiceJour ::.         

CustInvoiceJour.custTable_OrderAccount();