diff --git a/patches/api-ms-win-Stub_DLLs/0026-api-ms-win-rtcore-ntuser-window-l1-1-0-Add-dll.patch b/patches/api-ms-win-Stub_DLLs/0026-api-ms-win-rtcore-ntuser-window-l1-1-0-Add-dll.patch
new file mode 100644
index 00000000..852f68ff
--- /dev/null
+++ b/patches/api-ms-win-Stub_DLLs/0026-api-ms-win-rtcore-ntuser-window-l1-1-0-Add-dll.patch
@@ -0,0 +1,135 @@
+From 94e15216c8b2079c5b1b503594ead6f548158f57 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
+Date: Sat, 23 Jan 2016 21:05:14 +0100
+Subject: api-ms-win-rtcore-ntuser-window-l1-1-0: Add dll
+
+---
+ configure.ac                                       |  1 +
+ .../Makefile.in                                    |  1 +
+ .../api-ms-win-rtcore-ntuser-window-l1-1-0.spec    | 81 ++++++++++++++++++++++
+ tools/make_specfiles                               |  1 +
+ 4 files changed, 84 insertions(+)
+ create mode 100644 dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/Makefile.in
+ create mode 100644 dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/api-ms-win-rtcore-ntuser-window-l1-1-0.spec
+
+diff --git a/configure.ac b/configure.ac
+index 308f04e..9ee4464 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -2725,6 +2725,7 @@ WINE_CONFIG_DLL(api-ms-win-downlevel-version-l1-1-0)
+ WINE_CONFIG_DLL(api-ms-win-eventing-classicprovider-l1-1-0)
+ WINE_CONFIG_DLL(api-ms-win-eventing-provider-l1-1-0)
+ WINE_CONFIG_DLL(api-ms-win-ntuser-dc-access-l1-1-0)
++WINE_CONFIG_DLL(api-ms-win-rtcore-ntuser-window-l1-1-0)
+ WINE_CONFIG_DLL(api-ms-win-security-base-l1-1-0)
+ WINE_CONFIG_DLL(api-ms-win-security-base-l1-2-0)
+ WINE_CONFIG_DLL(api-ms-win-security-lsalookup-l1-1-0)
+diff --git a/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/Makefile.in b/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/Makefile.in
+new file mode 100644
+index 0000000..9641c2a
+--- /dev/null
++++ b/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/Makefile.in
+@@ -0,0 +1 @@
++MODULE    = api-ms-win-rtcore-ntuser-window-l1-1-0.dll
+diff --git a/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/api-ms-win-rtcore-ntuser-window-l1-1-0.spec b/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/api-ms-win-rtcore-ntuser-window-l1-1-0.spec
+new file mode 100644
+index 0000000..b7575c6
+--- /dev/null
++++ b/dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/api-ms-win-rtcore-ntuser-window-l1-1-0.spec
+@@ -0,0 +1,81 @@
++@ stdcall AllowSetForegroundWindow(long) user32.AllowSetForegroundWindow
++@ stdcall BeginDeferWindowPos(long) user32.BeginDeferWindowPos
++@ stdcall CallWindowProcW(ptr long long long long) user32.CallWindowProcW
++@ stdcall ChildWindowFromPoint(long int64) user32.ChildWindowFromPoint
++@ stdcall ChildWindowFromPointEx(long int64 long) user32.ChildWindowFromPointEx
++@ stdcall ClientToScreen(long ptr) user32.ClientToScreen
++@ stdcall CreateWindowExW(long wstr wstr long long long long long long long long ptr) user32.CreateWindowExW
++@ stdcall DefWindowProcW(long long long long) user32.DefWindowProcW
++@ stdcall DeferWindowPos(long long long long long long long long) user32.DeferWindowPos
++@ stdcall DestroyWindow(long) user32.DestroyWindow
++@ stdcall DispatchMessageW(ptr) user32.DispatchMessageW
++@ stdcall EnableWindow(long long) user32.EnableWindow
++@ stdcall EndDeferWindowPos(long) user32.EndDeferWindowPos
++@ stdcall EnumChildWindows(long ptr long) user32.EnumChildWindows
++@ stdcall EnumPropsExW(long ptr long) user32.EnumPropsExW
++@ stdcall EnumPropsW(long ptr) user32.EnumPropsW
++@ stdcall EnumWindows(ptr long) user32.EnumWindows
++@ stdcall FindWindowExW(long long wstr wstr) user32.FindWindowExW
++@ stdcall FindWindowW(wstr wstr) user32.FindWindowW
++@ stdcall GetActiveWindow() user32.GetActiveWindow
++@ stdcall GetAncestor(long long) user32.GetAncestor
++@ stdcall GetClassInfoExW(long wstr ptr) user32.GetClassInfoExW
++@ stdcall GetClassInfoW(long wstr ptr) user32.GetClassInfoW
++@ stdcall GetClassNameW(long ptr long) user32.GetClassNameW
++@ stdcall GetClientRect(long long) user32.GetClientRect
++@ stdcall GetCursorPos(ptr) user32.GetCursorPos
++@ stdcall GetDesktopWindow() user32.GetDesktopWindow
++@ stdcall GetFocus() user32.GetFocus
++@ stdcall GetForegroundWindow() user32.GetForegroundWindow
++@ stdcall GetMessageExtraInfo() user32.GetMessageExtraInfo
++@ stdcall GetMessagePos() user32.GetMessagePos
++@ stdcall GetMessageTime() user32.GetMessageTime
++@ stdcall GetMessageW(ptr long long long) user32.GetMessageW
++@ stdcall GetParent(long) user32.GetParent
++@ stdcall GetPropW(long wstr) user32.GetPropW
++@ stdcall GetQueueStatus(long) user32.GetQueueStatus
++@ stdcall GetTopWindow(long) user32.GetTopWindow
++@ stdcall GetWindow(long long) user32.GetWindow
++@ stdcall GetWindowLongA(long long) user32.GetWindowLongA
++@ stdcall GetWindowLongW(long long) user32.GetWindowLongW
++@ stdcall GetWindowRect(long ptr) user32.GetWindowRect
++@ stdcall GetWindowTextW(long ptr long) user32.GetWindowTextW
++@ stdcall GetWindowThreadProcessId(long ptr) user32.GetWindowThreadProcessId
++@ stdcall InSendMessage() user32.InSendMessage
++@ stdcall InSendMessageEx(ptr) user32.InSendMessageEx
++@ stdcall IsChild(long long) user32.IsChild
++@ stdcall IsWindow(long) user32.IsWindow
++@ stdcall IsWindowEnabled(long) user32.IsWindowEnabled
++@ stdcall IsWindowVisible(long) user32.IsWindowVisible
++@ stdcall KillTimer(long long) user32.KillTimer
++@ stdcall MoveWindow(long long long long long long) user32.MoveWindow
++@ stdcall PeekMessageW(ptr long long long long) user32.PeekMessageW
++@ stdcall PostMessageW(long long long long) user32.PostMessageW
++@ stdcall PostQuitMessage(long) user32.PostQuitMessage
++@ stdcall PostThreadMessageW(long long long long) user32.PostThreadMessageW
++@ stdcall RegisterClassExW(ptr) user32.RegisterClassExW
++@ stdcall RegisterClassW(ptr) user32.RegisterClassW
++@ stdcall RegisterWindowMessageW(wstr) user32.RegisterWindowMessageW
++@ stdcall RemovePropW(long wstr) user32.RemovePropW
++@ stdcall ScreenToClient(long ptr) user32.ScreenToClient
++@ stdcall SendMessageCallbackW(long long long long ptr long) user32.SendMessageCallbackW
++@ stdcall SendMessageTimeoutW(long long long long long long ptr) user32.SendMessageTimeoutW
++@ stdcall SendMessageW(long long long long) user32.SendMessageW
++@ stdcall SendNotifyMessageW(long long long long) user32.SendNotifyMessageW
++@ stdcall SetActiveWindow(long) user32.SetActiveWindow
++@ stdcall SetCursorPos(long long) user32.SetCursorPos
++@ stdcall SetFocus(long) user32.SetFocus
++@ stdcall SetForegroundWindow(long) user32.SetForegroundWindow
++@ stdcall SetMessageExtraInfo(long) user32.SetMessageExtraInfo
++@ stdcall SetParent(long long) user32.SetParent
++@ stdcall SetPropW(long wstr long) user32.SetPropW
++@ stdcall SetTimer(long long long ptr) user32.SetTimer
++@ stdcall SetWindowLongA(long long long) user32.SetWindowLongA
++@ stdcall SetWindowLongW(long long long) user32.SetWindowLongW
++@ stdcall SetWindowPos(long long long long long long long) user32.SetWindowPos
++@ stdcall SetWindowTextW(long wstr) user32.SetWindowTextW
++@ stdcall ShowWindow(long long) user32.ShowWindow
++@ stdcall TranslateMessage(ptr) user32.TranslateMessage
++@ stdcall UnregisterClassW(wstr long) user32.UnregisterClassW
++@ stdcall WaitMessage() user32.WaitMessage
++@ stdcall WindowFromPoint(int64) user32.WindowFromPoint
+diff --git a/tools/make_specfiles b/tools/make_specfiles
+index 7afc0c1..c88a32c 100755
+--- a/tools/make_specfiles
++++ b/tools/make_specfiles
+@@ -274,6 +274,7 @@ my @dll_groups =
+   "user32",
+   "api-ms-win-downlevel-user32-l1-1-0",
+   "api-ms-win-ntuser-dc-access-l1-1-0",
++  "api-ms-win-rtcore-ntuser-window-l1-1-0",
+   "ext-ms-win-ntuser-mouse-l1-1-0",
+  ],
+  [
+-- 
+2.6.4
+
diff --git a/patches/api-ms-win-Stub_DLLs/definition b/patches/api-ms-win-Stub_DLLs/definition
index 2ea7baa3..4c1e9e4b 100644
--- a/patches/api-ms-win-Stub_DLLs/definition
+++ b/patches/api-ms-win-Stub_DLLs/definition
@@ -19,6 +19,7 @@ Fixes: Add api-ms-win-core-threadpool-l1-2-0 dll
 Fixes: Add api-ms-win-shcore-stream-l1-1-0 dll
 Fixes: Add ext-ms-win-ntuser-mouse-l1-1-0 dll
 Fixes: Add ext-ms-win-uxtheme-themes-l1-1-0 dll
+Fixes: Add api-ms-win-rtcore-ntuser-window-l1-1-0 dll
 Fixes: Add kernelbase dll
 Fixes: Add iertutil dll
 Fixes: Add shcore dll
diff --git a/patches/patchinstall.sh b/patches/patchinstall.sh
index feace7d0..f10329b7 100755
--- a/patches/patchinstall.sh
+++ b/patches/patchinstall.sh
@@ -2593,18 +2593,19 @@ fi
 # | 	core-winrt-registration-l1-1-0/api-ms-win-core-winrt-registration-l1-1-0.spec, dlls/api-ms-win-core-
 # | 	wow64-l1-1-0/Makefile.in, dlls/api-ms-win-core-wow64-l1-1-0/api-ms-win-core-wow64-l1-1-0.spec, dlls/api-ms-win-eventing-
 # | 	classicprovider-l1-1-0/Makefile.in, dlls/api-ms-win-eventing-classicprovider-l1-1-0/api-ms-win-eventing-
-# | 	classicprovider-l1-1-0.spec, dlls/api-ms-win-shcore-obsolete-l1-1-0/Makefile.in, dlls/api-ms-win-shcore-obsolete-l1-1-0
-# | 	/api-ms-win-shcore-obsolete-l1-1-0.spec, dlls/api-ms-win-shcore-stream-l1-1-0/Makefile.in, dlls/api-ms-win-shcore-
-# | 	stream-l1-1-0/api-ms-win-shcore-stream-l1-1-0.spec, dlls/api-ms-win-shcore-thread-l1-1-0/Makefile.in, dlls/api-ms-win-
-# | 	shcore-thread-l1-1-0/api-ms-win-shcore-thread-l1-1-0.spec, dlls/ext-ms-win-appmodel-usercontext-l1-1-0/Makefile.in, dlls
-# | 	/ext-ms-win-appmodel-usercontext-l1-1-0/ext-ms-win-appmodel-usercontext-l1-1-0.spec, dlls/ext-ms-win-appmodel-
-# | 	usercontext-l1-1-0/main.c, dlls/ext-ms-win-ntuser-mouse-l1-1-0/Makefile.in, dlls/ext-ms-win-ntuser-mouse-l1-1-0/ext-ms-
-# | 	win-ntuser-mouse-l1-1-0.spec, dlls/ext-ms-win-uxtheme-themes-l1-1-0/Makefile.in, dlls/ext-ms-win-uxtheme-themes-l1-1-0
-# | 	/ext-ms-win-uxtheme-themes-l1-1-0.spec, dlls/ext-ms-win-xaml-pal-l1-1-0/Makefile.in, dlls/ext-ms-win-xaml-pal-l1-1-0
-# | 	/ext-ms-win-xaml-pal-l1-1-0.spec, dlls/ext-ms-win-xaml-pal-l1-1-0/main.c, dlls/iertutil/Makefile.in,
-# | 	dlls/iertutil/iertutil.spec, dlls/iertutil/main.c, dlls/kernelbase/Makefile.in, dlls/kernelbase/kernelbase.spec,
-# | 	dlls/kernelbase/misc.c, dlls/shcore/Makefile.in, dlls/shcore/shcore.spec, dlls/shlwapi/shlwapi.spec,
-# | 	tools/make_specfiles
+# | 	classicprovider-l1-1-0.spec, dlls/api-ms-win-rtcore-ntuser-window-l1-1-0/Makefile.in, dlls/api-ms-win-rtcore-ntuser-
+# | 	window-l1-1-0/api-ms-win-rtcore-ntuser-window-l1-1-0.spec, dlls/api-ms-win-shcore-obsolete-l1-1-0/Makefile.in, dlls/api-
+# | 	ms-win-shcore-obsolete-l1-1-0/api-ms-win-shcore-obsolete-l1-1-0.spec, dlls/api-ms-win-shcore-stream-l1-1-0/Makefile.in,
+# | 	dlls/api-ms-win-shcore-stream-l1-1-0/api-ms-win-shcore-stream-l1-1-0.spec, dlls/api-ms-win-shcore-
+# | 	thread-l1-1-0/Makefile.in, dlls/api-ms-win-shcore-thread-l1-1-0/api-ms-win-shcore-thread-l1-1-0.spec, dlls/ext-ms-win-
+# | 	appmodel-usercontext-l1-1-0/Makefile.in, dlls/ext-ms-win-appmodel-usercontext-l1-1-0/ext-ms-win-appmodel-
+# | 	usercontext-l1-1-0.spec, dlls/ext-ms-win-appmodel-usercontext-l1-1-0/main.c, dlls/ext-ms-win-ntuser-
+# | 	mouse-l1-1-0/Makefile.in, dlls/ext-ms-win-ntuser-mouse-l1-1-0/ext-ms-win-ntuser-mouse-l1-1-0.spec, dlls/ext-ms-win-
+# | 	uxtheme-themes-l1-1-0/Makefile.in, dlls/ext-ms-win-uxtheme-themes-l1-1-0/ext-ms-win-uxtheme-themes-l1-1-0.spec, dlls
+# | 	/ext-ms-win-xaml-pal-l1-1-0/Makefile.in, dlls/ext-ms-win-xaml-pal-l1-1-0/ext-ms-win-xaml-pal-l1-1-0.spec, dlls/ext-ms-
+# | 	win-xaml-pal-l1-1-0/main.c, dlls/iertutil/Makefile.in, dlls/iertutil/iertutil.spec, dlls/iertutil/main.c,
+# | 	dlls/kernelbase/Makefile.in, dlls/kernelbase/kernelbase.spec, dlls/kernelbase/misc.c, dlls/shcore/Makefile.in,
+# | 	dlls/shcore/shcore.spec, dlls/shlwapi/shlwapi.spec, tools/make_specfiles
 # |
 if test "$enable_api_ms_win_Stub_DLLs" -eq 1; then
 	patch_apply api-ms-win-Stub_DLLs/0001-api-ms-win-core-com-l1-1-1-Add-dll.patch
@@ -2632,6 +2633,7 @@ if test "$enable_api_ms_win_Stub_DLLs" -eq 1; then
 	patch_apply api-ms-win-Stub_DLLs/0023-api-ms-win-shcore-stream-l1-1-0-Add-dll.patch
 	patch_apply api-ms-win-Stub_DLLs/0024-ext-ms-win-ntuser-mouse-l1-1-0-Add-dll.patch
 	patch_apply api-ms-win-Stub_DLLs/0025-ext-ms-win-uxtheme-themes-l1-1-0-Add-dll.patch
+	patch_apply api-ms-win-Stub_DLLs/0026-api-ms-win-rtcore-ntuser-window-l1-1-0-Add-dll.patch
 	(
 		echo '+    { "Michael Müller", "api-ms-win-core-com-l1-1-1: Add dll.", 1 },';
 		echo '+    { "Michael Müller", "kernelbase: Add dll and add stub for QuirkIsEnabled.", 1 },';
@@ -2658,6 +2660,7 @@ if test "$enable_api_ms_win_Stub_DLLs" -eq 1; then
 		echo '+    { "Michael Müller", "api-ms-win-shcore-stream-l1-1-0: Add dll.", 1 },';
 		echo '+    { "Michael Müller", "ext-ms-win-ntuser-mouse-l1-1-0: Add dll.", 1 },';
 		echo '+    { "Michael Müller", "ext-ms-win-uxtheme-themes-l1-1-0: Add dll.", 1 },';
+		echo '+    { "Michael Müller", "api-ms-win-rtcore-ntuser-window-l1-1-0: Add dll.", 1 },';
 	) >> "$patchlist"
 fi