Rémi Bernon : win32u: Prevent user locale change in NtUserActivateKeyboardLayout.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: c0366cbb2e5126901de99b7742032a9ad3d9b69b
URL:    https://gitlab.winehq.org/wine/wine/-/commit/c0366cbb2e5126901de99b7742032a9...

Author: Rémi Bernon <rbernon(a)codeweavers.com>
Date:   Mon Feb 27 11:19:22 2023 +0100

win32u: Prevent user locale change in NtUserActivateKeyboardLayout.

---

 dlls/win32u/input.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/dlls/win32u/input.c b/dlls/win32u/input.c
index 8f71f93e0fe..11bb129134c 100644
--- a/dlls/win32u/input.c
+++ b/dlls/win32u/input.c
@@ -1193,6 +1193,7 @@ HKL WINAPI NtUserActivateKeyboardLayout( HKL layout, UINT flags )
 {
     struct user_thread_info *info = get_user_thread_info();
     HKL old_layout;
+    LCID locale;
     HWND focus;
 
     TRACE_(keyboard)( "layout %p, flags %x\n", layout, flags );
@@ -1206,6 +1207,13 @@ HKL WINAPI NtUserActivateKeyboardLayout( HKL layout, UINT flags )
         return 0;
     }
 
+    if (NtQueryDefaultLocale( TRUE, &locale ) || LOWORD(layout) != locale)
+    {
+        RtlSetLastWin32Error( ERROR_CALL_NOT_IMPLEMENTED );
+        FIXME_(keyboard)( "Changing user locale is not supported\n" );
+        return 0;
+    }
+
     if (!user_driver->pActivateKeyboardLayout( layout, flags ))
         return 0;