using css

@media screen and (-ms-view-state: fullscreen-landscape) {}@media screen and (-ms-view-state: fullscreen-portrait) {}@media screen and (-ms-view-state: filled) {}@media screen and (-ms-view-state: snapped) {}

 

using js:

(function () {    "use strict";    var app = WinJS.Application;    var view = Windows.UI.ViewManagement;    app.onactivated = function (eventObject) {        var value = getMessageFromView(view.ApplicationView.value);    };    function getMessageFromView(currentView) {        var displayMsg;        switch (currentView) {            case view.ApplicationViewState.filled:                displayMsg = "Filled View";                break;            case view.ApplicationViewState.snapped:                displayMsg = "Snapped View";                break;            case view.ApplicationViewState.fullScreenLandscape:                displayMsg = "Full - Landscape";                break;            case view.ApplicationViewState.fullScreenPortrait:                displayMsg = "Full - Portrait";                break;        }        return displayMsg;    }    app.start();})();