Create Sales Order and Invoicing the Order using X++

Hi All.
The below Job creates the Sales order from X++ code and post the invoice by making use of SalesFormLetter class.

static void CreateSalesOrder_and_Invoice(Args _args)
{
NumberSeq numberSeq;
SalesTable salesTable;
SalesLine salesLine;
SalesFormLetter salesFormLetter;
;
ttsbegin;
numberSeq = NumberSeq::newGetNumFromCode(salesParameters::numRefSalesId().NumberSequence,true);
// Initialize Sales order values
salesTable.initValue();
salesTable.SalesId = numberSeq.num();
salesTable.CustAccount = '3001';
salesTable.initFromCustTable();

if (!salesTable.validateWrite())
{
throw Exception::Error;
}
salesTable.insert();
// Initialize Sales Line items
salesLine.SalesId = salesTable.SalesId;
salesLine.ItemId = '1101';
salesLine.createLine(true, true, true, true, true, false);
ttscommit;
salesFormLetter = salesFormLetter::construct(DocumentStatus::Invoice);
//Pass the salesTable buffer to the update method.Also you can pass optional parameters to the update method based on your need.
salesFormLetter.update(salesTable);

if(SalesTable::find(salesTable.salesId).DocumentStatus == DocumentStatus::Invoice)
{
info(strfmt("Posted invoiced journal for Sales order %1",salesTable.SalesId));
}
}