Solution

Create a new method in the class PurchFormLetter_PackingSlip.

void initPrintJobSettings()
{
    PrintJobSettings printJobSettings;
    ;
    printJobSettings =
         new PrintJobSettings(printerSettingsFormletter);
    // set the output format of the packing slip to PDF
    printJobSettings.preferredMailFormat(PrintFormat::PDF);
    // set the mail recipient (this could be parameterised,
    // in the example it is hardcoded)
    if (purchTable)
        printJobSettings.mailTo(“foo@hotmail.com")
    // set the mail subject    if (purchTable)
        printJobSettings.mailSubject(‘@SYS72882’
           + “ “ + purchTable.PurchId);
    this.updatePrinterSettingsFormLetter(
        printJobSettings.packPrintJobSettings());
}    

Add a new method in the class PurchFormLetter.

void initPrintJobSettings()
{
}    

Call the method in the main method of the class PurchFormLetter.

{
    …
    purchFormLetter.parmId(parmId);
    purchFormLetter.transDate(systemDateGet());
    purchFormLetter.initPrintJobSettings();
    if (purchFormLetter.prompt())
    {
    …
}