PrintDialog printDialog = new PrintDialog(shell); // "shell" is the most bigger object that contain all the items I'd like to print
PrinterData printerData = printDialog.open();
Printer printer = new Printer(printerData); 
printer.startJob("");
printer.startPage();
GC gc = new GC(printer);

printer.endPage();
gc.dispose();
printer.endJob();				
printer.dispose();