fix #1571

src/Snap.Hutao/Snap.Hutao/Core/Windowing/WindowSubclass.cs

@@ -48,6 +48,7 @@ internal sealed class WindowSubclass : IDisposable
     {
         windowProc = OnSubclassProcedure;
         bool windowHooked = SetWindowSubclass(options.Hwnd, windowProc, WindowSubclassId, 0);
+        bool propHooked = SetPropW(options.Hwnd, "NonRudeHWND", BOOL.TRUE);
         hotKeyController.RegisterAll();
 
         bool titleBarHooked = true;
@@ -55,7 +56,7 @@ internal sealed class WindowSubclass : IDisposable
         // only hook up drag bar proc when use legacy Window.ExtendsContentIntoTitleBar
         if (!options.UseLegacyDragBarImplementation)
         {
-            return windowHooked && titleBarHooked;
+            return windowHooked && propHooked && titleBarHooked;
         }
 
         titleBarHooked = false;
@@ -63,13 +64,13 @@ internal sealed class WindowSubclass : IDisposable
 
         if (hwndDragBar.IsNull)
         {
-            return windowHooked && titleBarHooked;
+            return windowHooked && propHooked && titleBarHooked;
         }
 
         legacyDragBarProc = OnLegacyDragBarProcedure;
         titleBarHooked = SetWindowSubclass(hwndDragBar, legacyDragBarProc, DragBarSubclassId, 0);
 
-        return windowHooked && titleBarHooked;
+        return windowHooked && propHooked && titleBarHooked;
     }
 
     /// <inheritdoc/>
@@ -78,6 +79,7 @@ internal sealed class WindowSubclass : IDisposable
         hotKeyController.UnregisterAll();
 
         RemoveWindowSubclass(options.Hwnd, windowProc, WindowSubclassId);
+        RemovePropW(options.Hwnd, "NonRudeHWND");
         windowProc = default!;
 
         if (options.UseLegacyDragBarImplementation)

src/Snap.Hutao/Snap.Hutao/Win32/User32.cs

@@ -85,6 +85,19 @@ internal static class User32
     [SupportedOSPlatform("windows5.0")]
     public static extern int ReleaseDC([AllowNull] HWND hWnd, HDC hDC);
 
+    [DllImport("USER32.dll", CallingConvention = CallingConvention.Winapi, ExactSpelling = true)]
+    [SupportedOSPlatform("windows5.0")]
+    public static extern HANDLE RemovePropW(HWND hWnd, PCWSTR lpString);
+
+    [DebuggerStepThrough]
+    public static unsafe HANDLE RemovePropW(HWND hWnd, string str)
+    {
+        fixed (char* lpString = str)
+        {
+            return RemovePropW(hWnd, lpString);
+        }
+    }
+
     [DllImport("USER32.dll", CallingConvention = CallingConvention.Winapi, ExactSpelling = true, SetLastError = true)]
     [SupportedOSPlatform("windows5.0")]
     public static unsafe extern uint SendInput(uint cInputs, INPUT* pInputs, int cbSize);
@@ -102,6 +115,19 @@ internal static class User32
     [SupportedOSPlatform("windows5.0")]
     public static extern BOOL SetForegroundWindow(HWND hWnd);
 
+    [DllImport("USER32.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = true)]
+    [SupportedOSPlatform("windows5.0")]
+    public static extern BOOL SetPropW(HWND hWnd, PCWSTR lpString, [AllowNull] nint hData);
+
+    [DebuggerStepThrough]
+    public static unsafe BOOL SetPropW(HWND hWnd, string str, [AllowNull] nint hData)
+    {
+        fixed (char* lpString = str)
+        {
+            return SetPropW(hWnd, lpString, hData);
+        }
+    }
+
     [DllImport("USER32.dll", CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = true)]
     [SupportedOSPlatform("windows5.0")]
     public static extern nint SetWindowLongPtrW(HWND hWnd, WINDOW_LONG_PTR_INDEX nIndex, nint dwNewLong);