Print Report in Microsoft Dynamics AX 2009 through X++

I am trying to print sales confirmation report on a button click which I have added on Sales Order Detail form in Microsoft Dynamics AX 2009. On click event of that button, I have written following code:
void clicked()
{
    Args                args;
    ReportRun           reportRun;
    SalesFormLetter     salesFormLetter;
    PrintJobSettings    printJobSettings;
    CustConfirmJour     custConfirmJour;
    RecordSortedList    list                = new RecordSortedList(55);
    SalesTable          salesTableUpdate;
    ;

    SELECT firstonly custConfirmJour order by ConfirmID desc where custConfirmJour.SalesId == salesTable.SalesId ;

    list.ins(custConfirmJour);

    args = new Args(ReportStr(SalesConfirm));


    printJobSettings = new PrintJobSettings();
    printJobSettings.SetTarget(PrintMedium::Printer);
    printJobSettings.suppressScalingMessage(true);

    salesFormLetter  = new SalesFormLetter_Confirm(true);
    salesFormLetter.updatePrinterSettingsFormLetter(printJobSettings.packPrintJobSettings());

    args.designName("Standard");
    args.caller(salesFormletter);
    args.parmEnum(PrintCopyOriginal::Original);
    args.parmEnumType(enumnum(PrintCopyOriginal));
    args.object(list);

    reportRun = new ReportRun(args);
    reportRun.setTarget(PrintMedium::Printer);
    reportRun.init();
    reportRun.run();
}

try this:
public void run()
{
Args args; ReportRun report;
str printer;
PrintJobSettings pjs;
 ;
args = new Args(reportstr("PwC_ExciseInvoice_Sales"));
counter = 1;
pjs = new printJobSettings();

while(counter <= maxReports)
{
    args.parm(int2str(counter));
    args.record(custInvoiceJour);
    report = new ReportRun(args);
    pjs.setTarget(PrintMedium::Printer);
    report.setTarget(PrintMedium::Printer);
    report.init();
    report.run();

    counter++;
}

}