diff --git a/include/FramelessHelper/Core/framelesshelper_windows.h b/include/FramelessHelper/Core/framelesshelper_windows.h
index bd42cd9..6099dd5 100644
--- a/include/FramelessHelper/Core/framelesshelper_windows.h
+++ b/include/FramelessHelper/Core/framelesshelper_windows.h
@@ -153,6 +153,46 @@
 #  define DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED (reinterpret_cast<DPI_AWARENESS_CONTEXT>(-5))
 #endif
 
+#ifndef HKEY_CLASSES_ROOT
+#  define HKEY_CLASSES_ROOT ((HKEY)(ULONG_PTR)((LONG)0x80000000))
+#endif
+
+#ifndef HKEY_CURRENT_USER
+#  define HKEY_CURRENT_USER ((HKEY)(ULONG_PTR)((LONG)0x80000001))
+#endif
+
+#ifndef HKEY_LOCAL_MACHINE
+#  define HKEY_LOCAL_MACHINE ((HKEY)(ULONG_PTR)((LONG)0x80000002))
+#endif
+
+#ifndef HKEY_USERS
+#  define HKEY_USERS ((HKEY)(ULONG_PTR)((LONG)0x80000003))
+#endif
+
+#ifndef HKEY_PERFORMANCE_DATA
+#  define HKEY_PERFORMANCE_DATA ((HKEY)(ULONG_PTR)((LONG)0x80000004))
+#endif
+
+#ifndef HKEY_CURRENT_CONFIG
+#  define HKEY_CURRENT_CONFIG ((HKEY)(ULONG_PTR)((LONG)0x80000005))
+#endif
+
+#ifndef HKEY_DYN_DATA
+#  define HKEY_DYN_DATA ((HKEY)(ULONG_PTR)((LONG)0x80000006))
+#endif
+
+#ifndef HKEY_CURRENT_USER_LOCAL_SETTINGS
+#  define HKEY_CURRENT_USER_LOCAL_SETTINGS ((HKEY)(ULONG_PTR)((LONG)0x80000007))
+#endif
+
+#ifndef HKEY_PERFORMANCE_TEXT
+#  define HKEY_PERFORMANCE_TEXT ((HKEY)(ULONG_PTR)((LONG)0x80000050))
+#endif
+
+#ifndef HKEY_PERFORMANCE_NLSTEXT
+#  define HKEY_PERFORMANCE_NLSTEXT ((HKEY)(ULONG_PTR)((LONG)0x80000060))
+#endif
+
 #ifndef STATUS_SUCCESS
 #  define STATUS_SUCCESS (static_cast<NTSTATUS>(0x00000000L))
 #endif
diff --git a/src/core/framelesshelper_win.cpp b/src/core/framelesshelper_win.cpp
index 7ce2574..c308db0 100644
--- a/src/core/framelesshelper_win.cpp
+++ b/src/core/framelesshelper_win.cpp
@@ -451,7 +451,12 @@ Q_GLOBAL_STATIC(Win32Helper, g_win32Helper)
     const HWND fallbackTitleBarWindowHandle = CreateWindowExW((WS_EX_LAYERED | WS_EX_NOREDIRECTIONBITMAP),
                   kFallbackTitleBarWindowClassName, nullptr, WS_CHILD, 0, 0, 0, 0,
                   parentWindowHandle, nullptr, instance, nullptr);
-    Q_ASSERT(fallbackTitleBarWindowHandle);
+    Q_ASSERT_X(fallbackTitleBarWindowHandle, "createFallbackTitleBarWindow()",
+        "FramelessHelper is unable to create the fallback title bar window, and thus the snap layout feature will be disabled. "
+        "You can ignore this error and continue running your application, nothing else will be affected, so no need to worry. "
+        "But if you need the snap layout feature, please add a manifest file to your application and explicitly declare Windows"
+        " 11 compatibility in it. If you want to hide this error dialog, please use the FramelessConfig class to disable the "
+        " snap layout feature for Windows 11.");
     if (!fallbackTitleBarWindowHandle) {
         WARNING << Utils::getSystemErrorMessage(kCreateWindowExW);
         return false;