default.js

(function () {
	"use strict";

	var app = WinJS.Application;
	var activation = Windows.ApplicationModel.Activation;

	app.onactivated = function (args) {
	    if (args.detail.kind === activation.ActivationKind.launch) {
	        if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) {
	            // TODO: This application has been newly launched. Initialize your application here.

	            var s = Windows.UI.ViewManagement.StatusBar.getForCurrentView();
	            s.showAsync();

	        } else {
	            // TODO: This application was suspended and then terminated.
	            // To create a smooth user experience, restore application state here so that it looks like the app never stopped running.
	        }
	        args.setPromise(WinJS.UI.processAll());
		}
	};

	app.oncheckpoint = function (args) {
		// TODO: This application is about to be suspended. Save any state that needs to persist across suspensions here.
		// You might use the WinJS.Application.sessionState object, which is automatically saved and restored across suspension.
		// If you need to complete an asynchronous operation before your application is suspended, call args.setPromise().
	};

	app.start();
})();