Merged QuickLook.Common from submodule

https://github.com/QL-Win/QuickLook.Common/commit/529d07b56577b88329481cdac8f2a6a175b6c21a

QuickLook.Common/NativeMethods/Dwmapi.cs

@@ -0,0 +1,54 @@
+// Copyright © 2017-2026 QL-Win Contributors
+//
+// This file is part of QuickLook program.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System.Runtime.InteropServices;
+
+namespace QuickLook.Common.NativeMethods;
+
+public static class Dwmapi
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Margins(int cxLeftWidth, int cxRightWidth, int cyTopHeight, int cyBottomHeight)
+    {
+        public int cxLeftWidth = cxLeftWidth;
+        public int cxRightWidth = cxRightWidth;
+        public int cyTopHeight = cyTopHeight;
+        public int cyBottomHeight = cyBottomHeight;
+    }
+
+    public enum WindowAttribute
+    {
+        UseImmersiveDarkMode = 20,
+        SystembackdropType = 38,
+        MicaEffect = 1029,
+    }
+
+    public enum SystembackdropType
+    {
+        Auto = 0,
+        None = 1,
+        MainWindow = 2,
+        TransientWindow = 3,
+        TabbedWindow = 4,
+    }
+
+    [DllImport("DwmApi.dll")]
+    public static extern int DwmExtendFrameIntoClientArea(nint hwnd, ref Margins pMarInset);
+
+    [DllImport("dwmapi.dll")]
+    public static extern int DwmSetWindowAttribute(nint hwnd, uint dwAttribute, ref int pvAttribute, int cbAttribute);
+}