code: def do_windowed(self, arg):
          
          if self.cmdprefix:
              raise CmdError("prefix not allowed")
          cmdline = self.input_command_line(arg)
          try:
              process = self.debug.execl(arg,
                                                  bConsole = False,
                                                   bFollow = self.options.follow)
              print("Spawned process (%d)" % process.get_pid())
          except Exception:
              raise CmdError("can't execute")
          self.set_fake_last_event(process)
docs: windowed <target> [arguments...] - run a windowed program for debugging