private async void abtInk_Click(object sender, RoutedEventArgs e)
{
if (_ucInkWeb == null)
{
this.FindName("_ucInkWeb");
}
_ucInkWeb.Visibility = Visibility.Visible;
using (InMemoryRandomAccessStream streams = new InMemoryRandomAccessStream())
{
await web.CapturePreviewToStreamAsync(streams);
BitmapSource thumbnailBitmap = await UtilityClass.CreateScaledBitmapFromStreamAsync(web, streams);
_ucInkWeb.imgInk.Source = thumbnailBitmap;
}
}