3 files changed, 13 insertions, 1 deletions
diff --git a/src/corelib/global/qnamespace.h b/src/corelib/global/qnamespace.h
index dd70e91a8f..4da4e4ab0e 100644
--- a/src/corelib/global/qnamespace.h
+++ b/src/corelib/global/qnamespace.h
@@ -228,6 +228,7 @@ namespace Qt {
         WindowOverridesSystemGestures = 0x00100000,
         WindowDoesNotAcceptFocus = 0x00200000,
         MaximizeUsingFullscreenGeometryHint = 0x00400000,
+        MSWindowsNoRedirectionBitmap = 0x00800000,
 
         CustomizeWindowHint = 0x02000000,
         WindowStaysOnBottomHint = 0x04000000,
diff --git a/src/corelib/global/qnamespace.qdoc b/src/corelib/global/qnamespace.qdoc
index 000001c1bf..34640107b0 100644
--- a/src/corelib/global/qnamespace.qdoc
+++ b/src/corelib/global/qnamespace.qdoc
@@ -2190,6 +2190,14 @@
     \value MSWindowsOwnDC  Gives the window its own display
            context on Windows.
 
+    \value MSWindowsNoRedirectionBitmap This flag is useful to windows that
+           only use 3D graphics API to do the rendering, such as D3D11.
+           This flag was introduced in Qt 6.4
+
+           \note Changing this flag after the native window has been created will
+           have no effect. You can only enable it before the native window is
+           actually created.
+
     \value BypassWindowManagerHint This flag can be used to indicate to the platform plugin
            that "all" window manager protocols should be disabled. This flag will behave
            different depending on what operating system the application is running on and
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 929e468115..1ace82c5c7 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -841,8 +841,11 @@ void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flag
 
         // make mouse events fall through this window
         // NOTE: WS_EX_TRANSPARENT flag can make mouse inputs fall through a layered window
-        if (flagsIn & Qt::WindowTransparentForInput)
+        if (flags & Qt::WindowTransparentForInput)
             exStyle |= WS_EX_LAYERED | WS_EX_TRANSPARENT;
+
+        if (flags & Qt::MSWindowsNoRedirectionBitmap)
+            exStyle |= WS_EX_NOREDIRECTIONBITMAP;
     }
 }