diff --git a/include/FramelessHelper/Core/utils.h b/include/FramelessHelper/Core/utils.h
index 5470396..f5f32ba 100644
--- a/include/FramelessHelper/Core/utils.h
+++ b/include/FramelessHelper/Core/utils.h
@@ -78,6 +78,7 @@ FRAMELESSHELPER_CORE_API void startSystemResize(QWindow *window, const Qt::Edges
 [[nodiscard]] FRAMELESSHELPER_CORE_API QVariant getSystemButtonIconResource
     (const SystemButtonType button, const SystemTheme theme, const ResourceType type);
 FRAMELESSHELPER_CORE_API void sendMouseReleaseEvent();
+[[nodiscard]] FRAMELESSHELPER_CORE_API QWindow *findWindow(const WId winId);
 
 #ifdef Q_OS_WINDOWS
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isWin8OrGreater();
@@ -93,7 +94,7 @@ FRAMELESSHELPER_CORE_API void updateInternalWindowFrameMargins(QWindow *window,
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isFullScreen(const WId winId);
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isWindowNoState(const WId winId);
 FRAMELESSHELPER_CORE_API void syncWmPaintWithDwm();
-FRAMELESSHELPER_CORE_API void showSystemMenu(const WId winId, const QPoint &pos);
+FRAMELESSHELPER_CORE_API void showSystemMenu(const QWindow *window, const QPoint &pos);
 [[nodiscard]] FRAMELESSHELPER_CORE_API QColor getDwmColorizationColor();
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool shouldAppsUseDarkMode();
 [[nodiscard]] FRAMELESSHELPER_CORE_API DwmColorizationArea getDwmColorizationArea();
@@ -110,7 +111,7 @@ FRAMELESSHELPER_CORE_API void fixupQtInternals(const WId winId);
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isWindowFrameBorderVisible();
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isTitleBarColorized();
 [[nodiscard]] FRAMELESSHELPER_CORE_API bool isFrameBorderColorized();
-FRAMELESSHELPER_CORE_API void installSystemMenuHook(const WId winId);
+FRAMELESSHELPER_CORE_API void installSystemMenuHook(const QWindow *window);
 FRAMELESSHELPER_CORE_API void uninstallSystemMenuHook(const WId winId);
 FRAMELESSHELPER_CORE_API void tryToBeCompatibleWithQtFramelessWindowHint(QWindow *window, const bool enable);
 #endif // Q_OS_WINDOWS
diff --git a/include/FramelessHelper/Quick/framelessquickwindow.h b/include/FramelessHelper/Quick/framelessquickwindow.h
index f00cb06..c0450de 100644
--- a/include/FramelessHelper/Quick/framelessquickwindow.h
+++ b/include/FramelessHelper/Quick/framelessquickwindow.h
@@ -23,3 +23,20 @@
  */
 
 #pragma once
+
+#include "framelesshelperquick_global.h"
+#include <QtQuick/qquickwindow.h>
+
+FRAMELESSHELPER_BEGIN_NAMESPACE
+
+class FRAMELESSHELPER_QUICK_API FramelessQuickWindow : public QQuickWindow
+{
+    Q_OBJECT
+    Q_DISABLE_COPY_MOVE(FramelessQuickWindow)
+
+public:
+    explicit FramelessQuickWindow(QWindow *parent = nullptr);
+    ~FramelessQuickWindow() override;
+};
+
+FRAMELESSHELPER_END_NAMESPACE
diff --git a/src/core/framelesshelper_win.cpp b/src/core/framelesshelper_win.cpp
index 8cee0eb..fb2a5dc 100644
--- a/src/core/framelesshelper_win.cpp
+++ b/src/core/framelesshelper_win.cpp
@@ -487,7 +487,7 @@ bool FramelessHelperWin::nativeEventFilter(const QByteArray &eventType, void *me
         const bool full = Utils::isFullScreen(winId);
         const int frameSizeY = Utils::getResizeBorderThickness(winId, false, true);
         const bool isTop = (localPos.y < frameSizeY);
-        const bool isTitleBar = (false || (options & Option::DisableDragging));
+        const bool isTitleBar = (false && !(options & Option::DisableDragging));
         if (frameBorderVisible) {
             // This will handle the left, right and bottom parts of the frame
             // because we didn't change them.
diff --git a/src/core/framelesswindowsmanager.cpp b/src/core/framelesswindowsmanager.cpp
index 0b11c82..f341623 100644
--- a/src/core/framelesswindowsmanager.cpp
+++ b/src/core/framelesswindowsmanager.cpp
@@ -140,6 +140,9 @@ WId FramelessWindowsManagerPrivate::findWinIdById(const QUuid &value) const
 FramelessWindowsManager::FramelessWindowsManager(QObject *parent) : QObject(parent)
 {
     d_ptr.reset(new FramelessWindowsManagerPrivate(this));
+    if (!QCoreApplication::testAttribute(Qt::AA_DontCreateNativeWidgetSiblings)) {
+        QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
+    }
 }
 
 FramelessWindowsManager::~FramelessWindowsManager() = default;
@@ -194,7 +197,7 @@ void FramelessWindowsManager::addWindow(QWindow *window)
     }
     const auto options = qvariant_cast<Options>(window->property(kInternalOptionsFlag));
     if (!(options & Option::DontInstallSystemMenuHook)) {
-        Utils::installSystemMenuHook(winId);
+        Utils::installSystemMenuHook(window);
     }
 #endif
 }
diff --git a/src/core/utils.cpp b/src/core/utils.cpp
index 74bda13..46070cd 100644
--- a/src/core/utils.cpp
+++ b/src/core/utils.cpp
@@ -25,6 +25,7 @@
 #include "utils.h"
 #include <QtCore/qvariant.h>
 #include <QtGui/qwindow.h>
+#include <QtGui/qguiapplication.h>
 
 // The "Q_INIT_RESOURCE()" macro can't be used within a namespace,
 // so we wrap it into a separate function outside of the namespace and
@@ -150,4 +151,24 @@ QVariant Utils::getSystemButtonIconResource
     return {};
 }
 
+QWindow *Utils::findWindow(const WId winId)
+{
+    Q_ASSERT(winId);
+    if (!winId) {
+        return nullptr;
+    }
+    const QWindowList windows = QGuiApplication::topLevelWindows();
+    if (windows.isEmpty()) {
+        return nullptr;
+    }
+    for (auto &&window : qAsConst(windows)) {
+        if (window && window->handle()) {
+            if (window->winId() == winId) {
+                return window;
+            }
+        }
+    }
+    return nullptr;
+}
+
 FRAMELESSHELPER_END_NAMESPACE
diff --git a/src/core/utils_win.cpp b/src/core/utils_win.cpp
index bbd298e..63b86f9 100644
--- a/src/core/utils_win.cpp
+++ b/src/core/utils_win.cpp
@@ -57,6 +57,7 @@ struct Win32UtilsHelper
 {
     QMutex mutex = {};
     QHash<HWND, WNDPROC> qtWindowProcs = {};
+    QHash<HWND, QWindow *> windowMapping = {};
 
     explicit Win32UtilsHelper() = default;
     ~Win32UtilsHelper() = default;
@@ -181,6 +182,12 @@ static const QString successErrorText = QStringLiteral("The operation completed
         g_utilsHelper()->mutex.unlock();
         return DefWindowProcW(hWnd, uMsg, wParam, lParam);
     }
+    const QWindow * const window = g_utilsHelper()->windowMapping.value(hWnd);
+    Q_ASSERT(window);
+    if (!window) {
+        g_utilsHelper()->mutex.unlock();
+        return DefWindowProcW(hWnd, uMsg, wParam, lParam);
+    }
     g_utilsHelper()->mutex.unlock();
     const auto winId = reinterpret_cast<WId>(hWnd);
     const auto getGlobalPosFromMouse = [lParam]() -> QPoint {
@@ -237,7 +244,7 @@ static const QString successErrorText = QStringLiteral("The operation completed
         }
     }
     if (shouldShowSystemMenu) {
-        Utils::showSystemMenu(winId, globalPos);
+        Utils::showSystemMenu(window, globalPos);
         // QPA's internal code will handle system menu events separately, and its
         // behavior is not what we would want to see because it doesn't know our
         // window doesn't have any window frame now, so return early here to avoid
@@ -487,13 +494,13 @@ DwmColorizationArea Utils::getDwmColorizationArea()
     return DwmColorizationArea::None;
 }
 
-void Utils::showSystemMenu(const WId winId, const QPoint &pos)
+void Utils::showSystemMenu(const QWindow *window, const QPoint &pos)
 {
-    Q_ASSERT(winId);
-    if (!winId) {
+    Q_ASSERT(window);
+    if (!window) {
         return;
     }
-    const auto hWnd = reinterpret_cast<HWND>(winId);
+    const auto hWnd = reinterpret_cast<HWND>(window->winId());
     const HMENU menu = GetSystemMenu(hWnd, FALSE);
     if (!menu) {
         qWarning() << getSystemErrorMessage(QStringLiteral("GetSystemMenu"));
@@ -514,19 +521,21 @@ void Utils::showSystemMenu(const WId winId, const QPoint &pos)
         return true;
     };
     const bool maxOrFull = (IsMaximized(hWnd) || isFullScreen(reinterpret_cast<WId>(hWnd)));
-    if (!setState(SC_RESTORE, maxOrFull, true)) {
+    const auto options = qvariant_cast<Options>(window->property(kInternalOptionsFlag));
+    const bool fixedSize = (isWindowFixedSize(window) || (options & Option::DisableResizing));
+    if (!setState(SC_RESTORE, (maxOrFull && !fixedSize), true)) {
         return;
     }
-    if (!setState(SC_MOVE, !maxOrFull, false)) {
+    if (!setState(SC_MOVE, (!maxOrFull && !(options & Option::DisableDragging)), false)) {
         return;
     }
-    if (!setState(SC_SIZE, !maxOrFull, false)) {
+    if (!setState(SC_SIZE, (!maxOrFull && !fixedSize), false)) {
         return;
     }
     if (!setState(SC_MINIMIZE, true, false)) {
         return;
     }
-    if (!setState(SC_MAXIMIZE, !maxOrFull, false)) {
+    if (!setState(SC_MAXIMIZE, (!maxOrFull && !fixedSize), false)) {
         return;
     }
     if (!setState(SC_CLOSE, true, false)) {
@@ -557,7 +566,8 @@ bool Utils::isFullScreen(const WId winId)
         qWarning() << getSystemErrorMessage(QStringLiteral("GetWindowRect"));
         return false;
     }
-    // According to Microsoft Docs, we should compare to primary screen's geometry.
+    // According to Microsoft Docs, we should compare to the primary screen's geometry
+    // (if we can't determine the correct screen of our window).
     const HMONITOR mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTOPRIMARY);
     if (!mon) {
         qWarning() << getSystemErrorMessage(QStringLiteral("MonitorFromWindow"));
@@ -1007,13 +1017,13 @@ bool Utils::isFrameBorderColorized()
     return isTitleBarColorized();
 }
 
-void Utils::installSystemMenuHook(const WId winId)
+void Utils::installSystemMenuHook(const QWindow *window)
 {
-    Q_ASSERT(winId);
-    if (!winId) {
+    Q_ASSERT(window);
+    if (!window) {
         return;
     }
-    const auto hwnd = reinterpret_cast<HWND>(winId);
+    const auto hwnd = reinterpret_cast<HWND>(window->winId());
     QMutexLocker locker(&g_utilsHelper()->mutex);
     if (g_utilsHelper()->qtWindowProcs.contains(hwnd)) {
         return;
@@ -1030,8 +1040,9 @@ void Utils::installSystemMenuHook(const WId winId)
         qWarning() << getSystemErrorMessage(QStringLiteral("SetWindowLongPtrW"));
         return;
     }
-    g_utilsHelper()->qtWindowProcs.insert(hwnd, originalWindowProc);
     //triggerFrameChange(winId);
+    g_utilsHelper()->qtWindowProcs.insert(hwnd, originalWindowProc);
+    g_utilsHelper()->windowMapping.insert(hwnd, const_cast<QWindow *>(window));
 }
 
 void Utils::uninstallSystemMenuHook(const WId winId)
@@ -1055,8 +1066,9 @@ void Utils::uninstallSystemMenuHook(const WId winId)
         qWarning() << getSystemErrorMessage(QStringLiteral("SetWindowLongPtrW"));
         return;
     }
-    g_utilsHelper()->qtWindowProcs.remove(hwnd);
     //triggerFrameChange(winId);
+    g_utilsHelper()->qtWindowProcs.remove(hwnd);
+    g_utilsHelper()->windowMapping.remove(hwnd);
 }
 
 void Utils::sendMouseReleaseEvent()
diff --git a/src/quick/framelesshelper_quick.cpp b/src/quick/framelesshelper_quick.cpp
index 754e771..574089e 100644
--- a/src/quick/framelesshelper_quick.cpp
+++ b/src/quick/framelesshelper_quick.cpp
@@ -27,6 +27,7 @@
 #include "framelesshelperimageprovider.h"
 #include "framelessquickhelper.h"
 #include "framelessquickutils.h"
+#include "framelessquickwindow.h"
 
 // The "Q_INIT_RESOURCE()" macro can't be used inside a namespace,
 // the official workaround is to wrap it into a global function
@@ -64,6 +65,8 @@ void FramelessHelper::Quick::registerTypes(QQmlEngine *engine)
         Q_UNUSED(scriptEngine);
         return new FramelessQuickUtils;
     });
+    qmlRegisterType<FramelessQuickWindow>(FRAMELESSHELPER_QUICK_URI, 1, 0, "FramelessWindow");
+    qmlRegisterAnonymousType<QWindow, 254>(FRAMELESSHELPER_QUICK_URI, 1);
     initResource();
     qmlRegisterType(getQmlFileUrl(QStringLiteral("MinimizeButton")), FRAMELESSHELPER_QUICK_URI, 1, 0, "MinimizeButton");
     qmlRegisterType(getQmlFileUrl(QStringLiteral("MaximizeButton")), FRAMELESSHELPER_QUICK_URI, 1, 0, "MaximizeButton");
diff --git a/src/quick/framelessquickeventfilter.cpp b/src/quick/framelessquickeventfilter.cpp
index d3a0aee..d7546db 100644
--- a/src/quick/framelessquickeventfilter.cpp
+++ b/src/quick/framelessquickeventfilter.cpp
@@ -242,11 +242,11 @@ bool FramelessQuickEventFilter::eventFilter(QObject *object, QEvent *event)
         const QPoint globalPos = mouseEvent->globalPos();
 #endif
         const QPoint nativePos = QPointF(QPointF(globalPos) * window->effectiveDevicePixelRatio()).toPoint();
-        Utils::showSystemMenu(window->winId(), nativePos);
+        Utils::showSystemMenu(window, nativePos);
         return true;
     }
     case QEvent::MouseButtonDblClick: {
-        if (options & Option::NoDoubleClickMaximizeToggle) {
+        if ((options & Option::NoDoubleClickMaximizeToggle) || (options & Option::DisableResizing)) {
             return false;
         }
         if (button != Qt::LeftButton) {
diff --git a/src/quick/framelessquickutils.cpp b/src/quick/framelessquickutils.cpp
index 3fde495..e9a2461 100644
--- a/src/quick/framelessquickutils.cpp
+++ b/src/quick/framelessquickutils.cpp
@@ -184,7 +184,7 @@ void FramelessQuickUtils::showSystemMenu(QQuickWindow *window, const QPoint &pos
     const QPoint globalPos = window->mapToGlobal(pos);
 #  endif
     const QPoint nativePos = QPointF(QPointF(globalPos) * window->effectiveDevicePixelRatio()).toPoint();
-    Utils::showSystemMenu(window->winId(), nativePos);
+    Utils::showSystemMenu(window, nativePos);
 #endif
 }
 
diff --git a/src/quick/framelessquickwindow.cpp b/src/quick/framelessquickwindow.cpp
index ad5201a..09161a8 100644
--- a/src/quick/framelessquickwindow.cpp
+++ b/src/quick/framelessquickwindow.cpp
@@ -23,3 +23,11 @@
  */
 
 #include "framelessquickwindow.h"
+
+FRAMELESSHELPER_BEGIN_NAMESPACE
+
+FramelessQuickWindow::FramelessQuickWindow(QWindow *parent) : QQuickWindow(parent) {}
+
+FramelessQuickWindow::~FramelessQuickWindow() = default;
+
+FRAMELESSHELPER_END_NAMESPACE
diff --git a/src/widgets/framelesswidgetshelper.cpp b/src/widgets/framelesswidgetshelper.cpp
index edde5b2..7ff6408 100644
--- a/src/widgets/framelesswidgetshelper.cpp
+++ b/src/widgets/framelesswidgetshelper.cpp
@@ -248,7 +248,7 @@ void FramelessWidgetsHelper::mouseReleaseEventHandler(QMouseEvent *event)
     const QPoint globalPos = event->globalPos();
 #  endif
     const QPoint nativePos = QPointF(QPointF(globalPos) * q->devicePixelRatioF()).toPoint();
-    Utils::showSystemMenu(q->winId(), nativePos);
+    Utils::showSystemMenu(q->windowHandle(), nativePos);
 #endif
 }
 
@@ -258,7 +258,7 @@ void FramelessWidgetsHelper::mouseDoubleClickEventHandler(QMouseEvent *event)
     if (!event) {
         return;
     }
-    if (m_options & Option::NoDoubleClickMaximizeToggle) {
+    if ((m_options & Option::NoDoubleClickMaximizeToggle) || (m_options & Option::DisableResizing)) {
         return;
     }
     if (event->button() != Qt::LeftButton) {
@@ -291,7 +291,7 @@ void FramelessWidgetsHelper::initialize()
     q->setAttribute(Qt::WA_DontCreateNativeAncestors);
     // Force the widget become a native window now so that we can deal with its
     // win32 events as soon as possible.
-    q->createWinId();
+    q->setAttribute(Qt::WA_NativeWindow);
     QWindow * const window = q->windowHandle();
     Q_ASSERT(window);
     if (!window) {
@@ -506,6 +506,9 @@ void FramelessWidgetsHelper::updateSystemButtonsIcon()
 
 void FramelessWidgetsHelper::toggleMaximized()
 {
+    if (m_options & Option::DisableResizing) {
+        return;
+    }
     if (isZoomed()) {
         q->showNormal();
     } else {