From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Keeley Hammond <khammond@slack-corp.com>
Date: Thu, 25 Jul 2024 15:29:12 -0700
Subject: fix: building with UNICODE

Use the unicode version of 'RegOpenKeyEx' to avoid compilation error on string type.

Backport of https://github.com/c-ares/c-ares/pull/802.

diff --git a/deps/cares/src/lib/ares_event_configchg.c b/deps/cares/src/lib/ares_event_configchg.c
index c9b39f7b3358f37e61fb95e440695a9b590c2090..b33141ce3a30dd92509de8a4aff1a7fc76a5b915 100644
--- a/deps/cares/src/lib/ares_event_configchg.c
+++ b/deps/cares/src/lib/ares_event_configchg.c
@@ -319,15 +319,15 @@ ares_status_t ares_event_configchg_init(ares_event_configchg_t **configchg,
   /* Monitor HKLM\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\Interfaces
    * and HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
    * for changes via RegNotifyChangeKeyValue() */
-  if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
-        "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces",
+  if (RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+        L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces",
         0, KEY_NOTIFY, &c->regip4) != ERROR_SUCCESS) {
     status = ARES_ESERVFAIL;
     goto done;
   }
 
-  if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
-        "SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters\\Interfaces",
+  if (RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+        L"SYSTEM\\CurrentControlSet\\Services\\Tcpip6\\Parameters\\Interfaces",
         0, KEY_NOTIFY, &c->regip6) != ERROR_SUCCESS) {
     status = ARES_ESERVFAIL;
     goto done;