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++;
}
}