3 files changed, 23 insertions, 2 deletions
diff --git a/src/plugins/platforms/windows/qwindowsnativeinterface.cpp b/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
index db8b2ec094..659ef79c18 100644
--- a/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
+++ b/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
@@ -234,6 +234,8 @@ QFunctionPointer QWindowsNativeInterface::platformFunction(const QByteArray &fun
 {
     if (function == QWindowsWindowFunctions::setTouchWindowTouchTypeIdentifier())
         return QFunctionPointer(QWindowsWindow::setTouchWindowTouchTypeStatic);
+    else if (function == QWindowsWindowFunctions::setHasBorderInFullScreenIdentifier())
+        return QFunctionPointer(QWindowsWindow::setHasBorderInFullScreenStatic);
     return Q_NULLPTR;
 }
 
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 611d586b19..5aae1aafc5 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -1735,6 +1735,8 @@ void QWindowsWindow::setWindowState_sys(Qt::WindowState newState)
                 newStyle |= WS_SYSMENU;
             if (visible)
                 newStyle |= WS_VISIBLE;
+            if (testFlag(HasBorderInFullScreen))
+                newStyle |= WS_BORDER;
             setStyle(newStyle);
             // Use geometry of QWindow::screen() within creation or the virtual screen the
             // window is in (QTBUG-31166, QTBUG-30724).
@@ -2371,4 +2373,19 @@ void QWindowsWindow::aboutToMakeCurrent()
 #endif
 }
 
+void QWindowsWindow::setHasBorderInFullScreenStatic(QWindow *window, bool border)
+{
+    if (!window->handle())
+        return;
+    static_cast<QWindowsWindow *>(window->handle())->setHasBorderInFullScreen(border);
+}
+
+void QWindowsWindow::setHasBorderInFullScreen(bool border)
+{
+    if (border)
+        setFlag(HasBorderInFullScreen);
+    else
+        clearFlag(HasBorderInFullScreen);
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index 4172a3d850..710cab8597 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -137,7 +137,8 @@ public:
         WithinMaximize = 0x40000,
         MaximizeToFullScreen = 0x80000,
         InputMethodDisabled = 0x100000,
-        Compositing = 0x200000
+        Compositing = 0x200000,
+        HasBorderInFullScreen = 0x400000
     };
 
     QWindowsWindow(QWindow *window, const QWindowsWindowData &data);
@@ -251,7 +252,8 @@ public:
 
     static void setTouchWindowTouchTypeStatic(QWindow *window, QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes);
     void registerTouchWindow(QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes = QWindowsWindowFunctions::NormalTouch);
-
+    static void setHasBorderInFullScreenStatic(QWindow *window, bool border);
+    void setHasBorderInFullScreen(bool border);
 private:
     inline void show_sys() const;
     inline void hide_sys() const;