CameraCaptureUIPhotoFormat enumeration

var value = Windows.Media.Capture.CameraCaptureUIPhotoFormat.jpeg;

// Takes a photo with specified settings.
function takePhoto() {
    var captureUI = new Windows.Media.Capture.CameraCaptureUI();
    captureUI.photoSettings.allowCropping = true;
    captureUI.photoSettings.croppedAspectRatio.height = 3;
    captureUI.photoSettings.croppedAspectRatio.width = 4;
    captureUI.photoSettings.croppedSizeInPixels.height = 0;
    captureUI.photoSettings.croppedSizeInPixels.width = 0;
    captureUI.photoSettings.format = Windows.Media.Capture.CameraCaptureUIPhotoFormat.jpeg;
    captureUI.photoSettings.maxResolution = Windows.Media.Capture.CameraCaptureUIMaxPhotoResolution.highestAvailable;
    captureUI.captureFileAsync(Windows.Media.Capture.CameraCaptureUIMode.photo).then(function (capturedItem) {
        if (capturedItem) {
            document.getElementById("message").innerHTML = "User captured a photo."
        }
        else {
            document.getElementById("message").innerHTML = "User didn't capture a photo."
        }
    });
}