default.js

(function() {
  "use strict";
  
  var app = WinJS.Application;
  
  app.onactivate = function(args) {
    Windows.ApplicationModel.DataTransfer.DataTransferManager.getForCurrentView().addEventlistener("datarequested", shareHandler);
    // なんやかんや
  };
  
  app.oncheckpoint = function(args) {
    Windows.ApplicationModel.DataTransfer.DataTransferManager.getForCurrentView().removeEventlistener("datarequested", shareHandler);
    // なんやかんや
  }
  
  function shareHandler(e) {
    var request = e.request;
    var url = "http://jgs.me/";
    var uri = new Windows.Foundation.Uri(url);
    request.data.properties.title = "タイトル";
    request.data.properties.description = "説明";
    request.data.setText("Textdayo");
    request.data.setUri(uri);
    url = "http://jgs.me/some.png";
    uri = new Windows.Foundation.Uri(url);
    request.data.setBitmap(Windows.Storage.Streams.RandomAccessStreamReference.createFromUri(uri));
  }
})();