Добавлен example

Lattice.Example.DragDrop/WindowExtensions.cs

@@ -0,0 +1,15 @@
+using Microsoft.UI.Xaml;
+
+namespace Lattice.Example.DragDrop;
+
+public static class WindowExtensions
+{
+    public static void SetWindowSize(this Window window, int width, int height)
+    {
+        var hwnd = WinRT.Interop.WindowNative.GetWindowHandle(window);
+        var windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(hwnd);
+        var appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);
+
+        appWindow.Resize(new Windows.Graphics.SizeInt32(width, height));
+    }
+}