How can i change the pointer of my cursor in winui3?

I want to change my cursor ideally making it invisible but would settle for cross when it enters/exits a specified area.

After some research, I saw Window.Current.CoreWindow.PointerCursor always returns null for desktop which is what I use and so it just doesn't work. I've seen you can use reflection but I couldn't find any examples I could get to work, unfortunately. I was hoping someone could help me out.

    private void Canvas_PointerEntered(object sender, PointerRoutedEventArgs e)
    {
      
       
        
    }
   
    private void Canvas_PointerExited(object sender, PointerRoutedEventArgs e)
    {
      
        
        
     
    }

For the people who want the answer:

Since we need to access the ProtectedCursor property, which is a protected property in Grid, we need to create a custom Grid.

public class CustomGrid : Grid
{
    public InputCursor InputCursor
    {
        get => ProtectedCursor;
        set => ProtectedCursor = value;
    }
}

Use the CustomGrid as the area you want to change the mouse cursor. You need to set the Background to make this work.

<local:CustomGrid
    x:Name="CustomGrid"
    Background="Transparent"
    PointerEntered="CustomGrid_PointerEntered"
    PointerExited="CustomGrid_PointerExited">
    <!--  your contents here.  -->
</local:CustomGrid>

then in code-behind:

private InputCursor? OriginalInputCursor { get; set; }

private void CustomControl_PointerEntered(object sender, PointerRoutedEventArgs e)
{
    OriginalInputCursor = this.CustomGrid.InputCursor ?? InputSystemCursor.Create(InputSystemCursorShape.Arrow);
    this.CustomGrid.InputCursor = InputSystemCursor.Create(InputSystemCursorShape.UniversalNo);
}

private void CustomGrid_PointerExited(object sender, PointerRoutedEventArgs e)
{
    if (OriginalInputCursor != null)
    {
        this.CustomGrid.InputCursor = OriginalInputCursor;
    }
}