CoreCursor attached property helper class.

Cursor.cs

using System.Collections.Generic;
using System.Diagnostics;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Input;

namespace CursorTest
{
	public class Cursor : DependencyObject
	{
		private static readonly CoreCursor DefaultCursor = new CoreCursor(CoreCursorType.Arrow, 1);
		private static readonly HashSet<UIElement> AttachedElements = new HashSet<UIElement>();
		private static readonly Dictionary<CoreCursorType, CoreCursor> Cursors =
			new Dictionary<CoreCursorType, CoreCursor> {{CoreCursorType.Arrow, DefaultCursor}};

		public static readonly DependencyProperty UseProperty =
			DependencyProperty.RegisterAttached("Use", typeof(CoreCursorType), typeof(Cursor), new PropertyMetadata(CoreCursorType.Arrow));

		public static void SetUse(DependencyObject obj, CoreCursorType value)
		{
			if (!(obj is UIElement element)) return;
			lock (AttachedElements)
			{
				element.SetValue(UseProperty, value);
				if (!Cursors.ContainsKey(value))
				{
					Cursors[value] = new CoreCursor(value, 1);
				}
				if (!AttachedElements.Contains(element))
				{
					AttachedElements.Add(element);
					element.PointerEntered += Element_PointerEntered;
					element.PointerExited += Element_PointerExited;
				}
			}
		}

		public static CoreCursorType GetUse(DependencyObject element)
		{
			return (CoreCursorType)element.GetValue(UseProperty);
		}

		private static void Element_PointerEntered(object sender, PointerRoutedEventArgs e)
		{
			CoreCursorType cursor = GetUse((DependencyObject)sender);
			Window.Current.CoreWindow.PointerCursor = Cursors[cursor];
		}

		private static void Element_PointerExited(object sender, PointerRoutedEventArgs e)
		{
			Window.Current.CoreWindow.PointerCursor = DefaultCursor;
		}
	}
}