Devtools icon not showing up in node webkit app - windows 7 -

i building app using node webkit. in index.html file have added following piece of code ensure devtool/setting icon in node app's toolbar :

var gui = require('nw.gui');  var win = gui.window.get(),  nativemenubar = new gui.menu({      type: "menubar"  });   // check operating system menu  if (process.platform === "darwin") {      nativemenubar.createmacbuiltin("your app name");  }   // assign menu window  win.menu = nativemenubar; 

..while above code able bring devtools/setting icon in mac in linux-ubuntu, same not working win 7 , no settings/devtools icon appearing when same app opened in win 7.

any fix make sure devtool icon appears in toolbar of node app irrespective of os(mac,win or linux)?