Win8 WinJS Charms Bar Link

win8_charms-link.js

// tie into settings show event to append a link
var settingsPane = Windows.UI.ApplicationSettings.SettingsPane.getForCurrentView();
settingsPane.addEventListener("commandsrequested", onCommandsRequested);

function onCommandsRequested(e) {
  // create a link to the charm bar
  var rateCommand = new Windows.UI.ApplicationSettings.SettingsCommand("Rate", "Rate This App", onRateClick);
  e.request.applicationCommands.append(rateCommand);
}

function onRateClick(rateCommand) {
  var uri = new Windows.Foundation.Uri("http://www.google.com");

  Windows.System.Launcher.launchUriAsync(uri).then(
    function (success) {
      if (success)
        console.log('successful link out');
      else
        console.log('failed );
    }
  )
}