diff --git a/LunaTranslator/LunaTranslator/darkdetect.py b/LunaTranslator/LunaTranslator/darkdetect.py
deleted file mode 100644
index e7c9ffcf..00000000
--- a/LunaTranslator/LunaTranslator/darkdetect.py
+++ /dev/null
@@ -1,88 +0,0 @@
-from winreg import (
-    HKEY_CURRENT_USER as hkey,
-    QueryValueEx as getSubkeyValue,
-    OpenKey as getKey,
-)
-
-import ctypes
-import ctypes.wintypes
-
-advapi32 = ctypes.windll.advapi32
-
-# LSTATUS RegOpenKeyExA(
-#     HKEY hKey,
-#     LPCSTR lpSubKey,
-#     DWORD ulOptions,
-#     REGSAM samDesired,
-#     PHKEY phkResult
-# );
-advapi32.RegOpenKeyExA.argtypes = (
-    ctypes.wintypes.HKEY,
-    ctypes.wintypes.LPCSTR,
-    ctypes.wintypes.DWORD,
-    ctypes.wintypes.DWORD,
-    ctypes.POINTER(ctypes.wintypes.HKEY),
-)
-advapi32.RegOpenKeyExA.restype = ctypes.wintypes.LONG
-
-# LSTATUS RegQueryValueExA(
-#     HKEY hKey,
-#     LPCSTR lpValueName,
-#     LPDWORD lpReserved,
-#     LPDWORD lpType,
-#     LPBYTE lpData,
-#     LPDWORD lpcbData
-# );
-advapi32.RegQueryValueExA.argtypes = (
-    ctypes.wintypes.HKEY,
-    ctypes.wintypes.LPCSTR,
-    ctypes.wintypes.LPDWORD,
-    ctypes.wintypes.LPDWORD,
-    ctypes.wintypes.LPBYTE,
-    ctypes.wintypes.LPDWORD,
-)
-advapi32.RegQueryValueExA.restype = ctypes.wintypes.LONG
-
-# LSTATUS RegNotifyChangeKeyValue(
-#     HKEY hKey,
-#     WINBOOL bWatchSubtree,
-#     DWORD dwNotifyFilter,
-#     HANDLE hEvent,
-#     WINBOOL fAsynchronous
-# );
-advapi32.RegNotifyChangeKeyValue.argtypes = (
-    ctypes.wintypes.HKEY,
-    ctypes.wintypes.BOOL,
-    ctypes.wintypes.DWORD,
-    ctypes.wintypes.HANDLE,
-    ctypes.wintypes.BOOL,
-)
-advapi32.RegNotifyChangeKeyValue.restype = ctypes.wintypes.LONG
-
-
-def theme():
-    """Uses the Windows Registry to detect if the user is using Dark Mode"""
-    # Registry will return 0 if Windows is in Dark Mode and 1 if Windows is in Light Mode. This dictionary converts that output into the text that the program is expecting.
-    valueMeaning = {0: "Dark", 1: "Light"}
-    # In HKEY_CURRENT_USER, get the Personalisation Key.
-    try:
-        key = getKey(
-            hkey, "Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize"
-        )
-        # In the Personalisation Key, get the AppsUseLightTheme subkey. This returns a tuple.
-        # The first item in the tuple is the result we want (0 or 1 indicating Dark Mode or Light Mode); the other value is the type of subkey e.g. DWORD, QWORD, String, etc.
-        subkey = getSubkeyValue(key, "AppsUseLightTheme")[0]
-    except FileNotFoundError:
-        # some headless Windows instances (e.g. GitHub Actions or Docker images) do not have this key
-        return None
-    return valueMeaning[subkey]
-
-
-def isDark():
-    if theme() is not None:
-        return theme() == "Dark"
-
-
-def isLight():
-    if theme() is not None:
-        return theme() == "Light"
diff --git a/LunaTranslator/LunaTranslator/gui/settin.py b/LunaTranslator/LunaTranslator/gui/settin.py
index c979a058..6dc26fb9 100644
--- a/LunaTranslator/LunaTranslator/gui/settin.py
+++ b/LunaTranslator/LunaTranslator/gui/settin.py
@@ -17,6 +17,7 @@ from PyQt5.QtWidgets import QTabWidget
 import qtawesome, darkdetect, gobject
 import functools, threading, windows, os, winsharedutils
 from traceback import print_exc
+from winsharedutils import isDark
 from myutils.config import globalconfig, _TR
 from myutils.utils import wavmp3player
 from myutils.config import static_data
@@ -253,9 +254,7 @@ class Settin(closeashidewindow):
         elif dl == 1:
             dark = True
         elif dl == 2:
-            dark = darkdetect.isDark()
-            if dark is None:
-                dark = False
+            dark = isDark()
         darklight = ["light", "dark"][dark]
 
         class WindowEventFilter(QObject):
diff --git a/LunaTranslator/LunaTranslator/winsharedutils.py b/LunaTranslator/LunaTranslator/winsharedutils.py
index bb925697..946f88d1 100644
--- a/LunaTranslator/LunaTranslator/winsharedutils.py
+++ b/LunaTranslator/LunaTranslator/winsharedutils.py
@@ -344,3 +344,6 @@ getpidhwndfirst.restype = HWND
 Is64bit = utilsdll.Is64bit
 Is64bit.argtypes = (DWORD,)
 Is64bit.restype = c_bool
+
+isDark = utilsdll.isDark
+isDark.restype = c_bool
diff --git a/plugins/winsharedutils/theme.cpp b/plugins/winsharedutils/theme.cpp
index 1d2973ec..bfa01254 100644
--- a/plugins/winsharedutils/theme.cpp
+++ b/plugins/winsharedutils/theme.cpp
@@ -1,6 +1,7 @@
 #include <Windows.h>
 #include <stdint.h>
 #include <dwmapi.h>
+#include <string>
 #include "define.h"
 // https://github.com/Blinue/Xaml-Islands-Cpp/blob/main/src/XamlIslandsCpp/XamlWindow.h
 
@@ -169,5 +170,23 @@ bool _SetTheme(
     DWM_SYSTEMBACKDROP_TYPE value = BACKDROP_MAP[(int)backdrop];
     DwmSetWindowAttribute(_hWnd, DWMWA_SYSTEMBACKDROP_TYPE, &value, sizeof(value));
 
+    return false;
+}
+
+DECLARE bool isDark()
+{
+    HKEY hKey;
+    const char *subKey = "Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize";
+    if (RegOpenKeyExA(HKEY_CURRENT_USER, subKey, 0, KEY_READ, &hKey) == ERROR_SUCCESS)
+    {
+        DWORD value;
+        DWORD dataSize = sizeof(DWORD);
+        if (RegQueryValueExA(hKey, "AppsUseLightTheme", 0, NULL, (LPBYTE)&value, &dataSize) == ERROR_SUCCESS)
+        {
+            RegCloseKey(hKey);
+            return 1 - value;
+        }
+        RegCloseKey(hKey);
+    }
     return false;
 }
\ No newline at end of file