From fb53e19cededbd78158231ae4aed8ca0f0a92ed4 Mon Sep 17 00:00:00 2001
From: Renn <8340896+AkazaRenn@users.noreply.github.com>
Date: Wed, 24 Dec 2025 22:06:54 -0500
Subject: [PATCH] Fix ToggleWindowStyle not working on visible = true

---
 src/WinUIEx/HwndExtensions.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/WinUIEx/HwndExtensions.cs b/src/WinUIEx/HwndExtensions.cs
index 44bd44a..9c987a4 100644
--- a/src/WinUIEx/HwndExtensions.cs
+++ b/src/WinUIEx/HwndExtensions.cs
@@ -238,7 +238,7 @@ public static void ToggleWindowStyle(IntPtr hWnd, bool visible, WindowStyle styl
             var currentStyle = PInvoke.GetWindowLong(h, WINDOW_LONG_PTR_INDEX.GWL_STYLE);
             var newStyle = currentStyle;
             if (visible)
-                newStyle = (newStyle & (int)style);
+                newStyle = (newStyle | (int)style);
             else
                 newStyle = (newStyle & ~(int)style);
             var r = PInvoke.SetWindowLong(h, WINDOW_LONG_PTR_INDEX.GWL_STYLE, newStyle);