wouldn't this code attach the listeners to the buttons each time show() is called? function show(caption) { var ok = WinJS.Utilities.query('button#ok', element)[0], cancel = WinJS.Utilities.query('button#cancel', element)[0]; return new WinJS.Promise(function (complete, error, progress) { ok.addEventListener('click', function () { complete(true); }); cancel.addEventListener('click', function () { complete(false); }); }); } Shouldn't the listeners be removed after the promise is gone?