2 files changed, 42 insertions, 0 deletions
diff --git a/src/platformheaders/windowsfunctions/qwindowswindowfunctions.h b/src/platformheaders/windowsfunctions/qwindowswindowfunctions.h
index e51c2fde67..032dcafa6e 100644
--- a/src/platformheaders/windowsfunctions/qwindowswindowfunctions.h
+++ b/src/platformheaders/windowsfunctions/qwindowswindowfunctions.h
@@ -81,6 +81,15 @@ public:
             func(window, border);
     }
 
+    typedef void (*SetHasBorderInFullScreenDefault)(bool border);
+    static const QByteArray setHasBorderInFullScreenDefaultIdentifier() { return QByteArrayLiteral("WindowsSetHasBorderInFullScreenDefault"); }
+    static void setHasBorderInFullScreenDefault(bool border)
+    {
+        auto func = reinterpret_cast<SetHasBorderInFullScreenDefault>(QGuiApplication::platformFunction(setHasBorderInFullScreenDefaultIdentifier()));
+        if (func)
+            func(border);
+    }
+
     typedef void (*SetWindowActivationBehaviorType)(WindowActivationBehavior);
     static const QByteArray setWindowActivationBehaviorIdentifier() { return QByteArrayLiteral("WindowsSetWindowActivationBehavior"); }
 
diff --git a/src/platformheaders/windowsfunctions/qwindowswindowfunctions.qdoc b/src/platformheaders/windowsfunctions/qwindowswindowfunctions.qdoc
index a52bbe061b..0c52cde753 100644
--- a/src/platformheaders/windowsfunctions/qwindowswindowfunctions.qdoc
+++ b/src/platformheaders/windowsfunctions/qwindowswindowfunctions.qdoc
@@ -93,7 +93,40 @@
     is true then it will enable the WS_BORDER flag in full screen mode to enable other top level windows
     inside the application to appear on top when required.
 
+    \note The setting must be applied before showing the window or switching it
+    to full screen. For QML, setHasBorderInFullScreenDefault() can be used to
+    set a default value.
+
+    See also \l [QtDoc] {Fullscreen OpenGL Based Windows}
+*/
+
+/*!
+    \typedef QWindowsWindowFunctions::SetHasBorderInFullScreenDefault
+    \since 5.13
+
+    This is the typedef for the function returned by QGuiApplication::platformFunction
+    when passed setHasBorderInFullScreenDefaultIdentifier.
+*/
+
+/*!
+    \fn QByteArray QWindowsWindowFunctions::setHasBorderInFullScreenDefaultIdentifier()
+    \since 5.13
+
+    This function returns the bytearray that can be used to query
+    QGuiApplication::platformFunction to retrieve the SetHasBorderInFullScreen function.
+*/
+
+/*!
+    \fn void QWindowsWindowFunctions::setHasBorderInFullScreenDefault(bool border)
+    \since 5.13
+
+    This is a convenience function that can be used directly instead of resolving
+    the function pointer. \a border will be relayed to the function retrieved by
+    QGuiApplication. When \a border is true, the WS_BORDER flag will be set
+    in full screen mode for all windows by default.
+
     See also \l [QtDoc] {Fullscreen OpenGL Based Windows}
+    \sa setHasBorderInFullScreen()
 */
 
 /*!