fix: Prevent DXGI from intercepting Alt+Enter and PrintScreen (#18970)

* disable key shortcuts forced by dxgi composition

* moved enum, fixed types

src/Windows/Avalonia.Win32/DirectX/DirectXEnums.cs

@@ -213,6 +213,14 @@ namespace Avalonia.Win32.DirectX
         DXGI_ERROR_WAS_STILL_DRAWING = 0x887A000A
     }
 
+    [Flags]
+    internal enum DXGI_MWA : uint
+    {
+        DXGI_MWA_NO_WINDOW_CHANGES = 1,
+        DXGI_MWA_NO_ALT_ENTER = 2,
+        DXGI_MWA_NO_PRINT_SCREEN = 4
+    }
+    
     internal static class DxgiErrorExtensions
     {
         public static bool IsDeviceLostError(this DXGI_ERROR error)

src/Windows/Avalonia.Win32/DirectX/DxgiRenderTarget.cs

@@ -23,7 +23,7 @@ namespace Avalonia.Win32.DirectX
 
         private IUnknown? _renderTexture;
         private RECT _clientRect;
-
+        
         public DxgiRenderTarget(EglGlPlatformSurface.IEglWindowGlPlatformSurfaceInfo window, EglContext context, DxgiConnection connection) : base(context)
         {
             _window = window;
@@ -68,6 +68,8 @@ namespace Avalonia.Win32.DirectX
                     null
             );
 
+            _dxgiFactory.MakeWindowAssociation(window.Handle, (uint)(DXGI_MWA.DXGI_MWA_NO_ALT_ENTER | DXGI_MWA.DXGI_MWA_NO_PRINT_SCREEN));
+
             GetClientRect(_window.Handle, out var pClientRect);
             _clientRect = pClientRect;
         }