[PATCH v3 3/5] win32u: Prevent user locale change in NtUserActivateKeyboardLayout.

[Rémi Bernon]

From: Rémi Bernon

---
 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;