Incorrect Window.X and Window.Y values when closing a maximized window

[Dhivya-SF4094]

Describe the bug

if the application window is maximized, the main window X andY values results in -11, -11 when the Window_Destroying(). For a non-maximized window, values are correct.

public partial class App : Application
{

	private void M_window_Closed(object sender, WindowEventArgs args)
	{
		var window = sender as Window;
		// Get HWND
		var hwnd = WindowNative.GetWindowHandle(window);

		// Get WindowId
		var windowId = Win32Interop.GetWindowIdFromWindow(hwnd);

		// Get AppWindow
		var appWindow = AppWindow.GetFromWindowId(windowId);

		// Get position and size
		PointInt32 position = appWindow.Position;
		SizeInt32 size = appWindow.Size;

		int x = position.X;
		int y = position.Y;
		int width = size.Width;
		int height = size.Height;

		Debug.WriteLine($"Window X:{x}, Y:{y}, Width:{width}, Height:{height}");
	}
}

Steps to reproduce the bug

1. Run the attached sample.
2. Maximize application window and close window.
3. Observe the output results in X = -11, Y = -11, Width = 1942 and Height = 1030.

IssueRepo.zip

Expected behavior

No response

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.7.1: 1.7.250401001

Windows version

Windows 11 (23H2): Build 22631

Additional context

No response

[castorix]

It is because of DWM
It calls GetWindowRect which returns negative x, y when maximized, depending on DPI (-8, -9, -11,...)
You get 0,0 by calculating the difference with DwmGetWindowAttribute and DWMWA_EXTENDED_FRAME_BOUNDS