3 files changed, 11 insertions, 1 deletions
diff --git a/src/plugins/platforms/windows/qwindowsnativeinterface.cpp b/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
index de11356fd4..a1ff6f1141 100644
--- a/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
+++ b/src/plugins/platforms/windows/qwindowsnativeinterface.cpp
@@ -277,6 +277,8 @@ QFunctionPointer QWindowsNativeInterface::platformFunction(const QByteArray &fun
         return QFunctionPointer(QWindowsWindow::setTouchWindowTouchTypeStatic);
     if (function == QWindowsWindowFunctions::setHasBorderInFullScreenIdentifier())
         return QFunctionPointer(QWindowsWindow::setHasBorderInFullScreenStatic);
+    if (function == QWindowsWindowFunctions::setHasBorderInFullScreenDefaultIdentifier())
+        return QFunctionPointer(QWindowsWindow::setHasBorderInFullScreenDefault);
     if (function == QWindowsWindowFunctions::setWindowActivationBehaviorIdentifier())
         return QFunctionPointer(QWindowsNativeInterface::setWindowActivationBehavior);
     if (function == QWindowsWindowFunctions::isTabletModeIdentifier())
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index f340f16679..6201da7b72 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -1190,6 +1190,7 @@ QWindowCreationContext::QWindowCreationContext(const QWindow *w,
 
 const char *QWindowsWindow::embeddedNativeParentHandleProperty = "_q_embedded_native_parent_handle";
 const char *QWindowsWindow::hasBorderInFullScreenProperty = "_q_has_border_in_fullscreen";
+bool QWindowsWindow::m_borderInFullScreenDefault = false;
 
 QWindowsWindow::QWindowsWindow(QWindow *aWindow, const QWindowsWindowData &data) :
     QWindowsBaseWindow(aWindow),
@@ -1227,7 +1228,7 @@ QWindowsWindow::QWindowsWindow(QWindow *aWindow, const QWindowsWindowData &data)
 
     if (aWindow->isTopLevel())
         setWindowIcon(aWindow->icon());
-    if (aWindow->property(hasBorderInFullScreenProperty).toBool())
+    if (m_borderInFullScreenDefault || aWindow->property(hasBorderInFullScreenProperty).toBool())
         setFlag(HasBorderInFullScreen);
     clearFlag(WithinCreate);
 }
@@ -2804,6 +2805,11 @@ void QWindowsWindow::setHasBorderInFullScreenStatic(QWindow *window, bool border
         window->setProperty(hasBorderInFullScreenProperty, QVariant(border));
 }
 
+void QWindowsWindow::setHasBorderInFullScreenDefault(bool border)
+{
+    m_borderInFullScreenDefault = border;
+}
+
 void QWindowsWindow::setHasBorderInFullScreen(bool border)
 {
     if (testFlag(HasBorderInFullScreen) == border)
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index e8c30bd44b..4d136151fe 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -338,6 +338,7 @@ public:
     static void setTouchWindowTouchTypeStatic(QWindow *window, QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes);
     void registerTouchWindow(QWindowsWindowFunctions::TouchWindowTouchTypes touchTypes = QWindowsWindowFunctions::NormalTouch);
     static void setHasBorderInFullScreenStatic(QWindow *window, bool border);
+    static void setHasBorderInFullScreenDefault(bool border);
     void setHasBorderInFullScreen(bool border);
     static QString formatWindowTitle(const QString &title);
 
@@ -381,6 +382,7 @@ private:
     // note: intentionally not using void * in order to avoid breaking x86
     VkSurfaceKHR m_vkSurface = 0;
 #endif
+    static bool m_borderInFullScreenDefault;
 };
 
 #ifndef QT_NO_DEBUG_STREAM