[reactos] 03/03: [KERNEL32] SetThreadUILanguage(): Validate the parameter. Use LANGIDFROMLCID() macro. (#4301)

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=a94436b5194ca86fedc75…

commit a94436b5194ca86fedc759c63f79653c85e281a0
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Fri Jan 21 18:01:29 2022 +0100
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Tue Feb 8 15:58:04 2022 +0100

    [KERNEL32] SetThreadUILanguage(): Validate the parameter. Use LANGIDFROMLCID() macro.
(#4301)
    
    Both ReactOS and Win2k3 only support '0' for the parameter.
---
 dll/win32/kernel32/client/thread.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/dll/win32/kernel32/client/thread.c b/dll/win32/kernel32/client/thread.c
index be33021fcf3..6d31a1b394d 100644
--- a/dll/win32/kernel32/client/thread.c
+++ b/dll/win32/kernel32/client/thread.c
@@ -935,8 +935,19 @@ LANGID
 WINAPI
 SetThreadUILanguage(IN LANGID LangId)
 {
+#if (NTDDI_VERSION < NTDDI_LONGHORN)
+    /* We only support LangId == 0, for selecting a language
+     * identifier that best supports the NT Console. */
+    if (LangId != 0)
+    {
+        BaseSetLastNTError(STATUS_NOT_SUPPORTED);
+        return 0;
+    }
+#endif
+
     UNIMPLEMENTED;
-    return (LANGID)NtCurrentTeb()->CurrentLocale;
+
+    return LANGIDFROMLCID(NtCurrentTeb()->CurrentLocale);
 }
 
 /*