1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/xpcom/ds/nsWindowsRegKey.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,549 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include <windows.h>
1.11 +#include <shlwapi.h>
1.12 +#include <stdlib.h>
1.13 +#include "nsWindowsRegKey.h"
1.14 +#include "nsString.h"
1.15 +#include "nsCOMPtr.h"
1.16 +#include "mozilla/Attributes.h"
1.17 +#include "nsAutoPtr.h"
1.18 +
1.19 +//-----------------------------------------------------------------------------
1.20 +
1.21 +// According to MSDN, the following limits apply (in characters excluding room
1.22 +// for terminating null character):
1.23 +#define MAX_KEY_NAME_LEN 255
1.24 +#define MAX_VALUE_NAME_LEN 16383
1.25 +
1.26 +class nsWindowsRegKey MOZ_FINAL : public nsIWindowsRegKey
1.27 +{
1.28 +public:
1.29 + NS_DECL_ISUPPORTS
1.30 + NS_DECL_NSIWINDOWSREGKEY
1.31 +
1.32 + nsWindowsRegKey()
1.33 + : mKey(nullptr)
1.34 + , mWatchEvent(nullptr)
1.35 + , mWatchRecursive(FALSE)
1.36 + {
1.37 + }
1.38 +
1.39 +private:
1.40 + ~nsWindowsRegKey()
1.41 + {
1.42 + Close();
1.43 + }
1.44 +
1.45 + HKEY mKey;
1.46 + HANDLE mWatchEvent;
1.47 + BOOL mWatchRecursive;
1.48 +};
1.49 +
1.50 +NS_IMPL_ISUPPORTS(nsWindowsRegKey, nsIWindowsRegKey)
1.51 +
1.52 +NS_IMETHODIMP
1.53 +nsWindowsRegKey::GetKey(HKEY *key)
1.54 +{
1.55 + *key = mKey;
1.56 + return NS_OK;
1.57 +}
1.58 +
1.59 +NS_IMETHODIMP
1.60 +nsWindowsRegKey::SetKey(HKEY key)
1.61 +{
1.62 + // We do not close the older key!
1.63 + StopWatching();
1.64 +
1.65 + mKey = key;
1.66 + return NS_OK;
1.67 +}
1.68 +
1.69 +NS_IMETHODIMP
1.70 +nsWindowsRegKey::Close()
1.71 +{
1.72 + StopWatching();
1.73 +
1.74 + if (mKey) {
1.75 + RegCloseKey(mKey);
1.76 + mKey = nullptr;
1.77 + }
1.78 + return NS_OK;
1.79 +}
1.80 +
1.81 +NS_IMETHODIMP
1.82 +nsWindowsRegKey::Open(uint32_t rootKey, const nsAString &path, uint32_t mode)
1.83 +{
1.84 + Close();
1.85 +
1.86 + LONG rv = RegOpenKeyExW((HKEY)(intptr_t) rootKey, PromiseFlatString(path).get(), 0,
1.87 + (REGSAM) mode, &mKey);
1.88 +
1.89 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.90 +}
1.91 +
1.92 +NS_IMETHODIMP
1.93 +nsWindowsRegKey::Create(uint32_t rootKey, const nsAString &path, uint32_t mode)
1.94 +{
1.95 + Close();
1.96 +
1.97 + DWORD disposition;
1.98 + LONG rv = RegCreateKeyExW((HKEY)(intptr_t) rootKey, PromiseFlatString(path).get(), 0,
1.99 + nullptr, REG_OPTION_NON_VOLATILE, (REGSAM) mode, nullptr,
1.100 + &mKey, &disposition);
1.101 +
1.102 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.103 +}
1.104 +
1.105 +NS_IMETHODIMP
1.106 +nsWindowsRegKey::OpenChild(const nsAString &path, uint32_t mode,
1.107 + nsIWindowsRegKey **result)
1.108 +{
1.109 + if (NS_WARN_IF(!mKey))
1.110 + return NS_ERROR_NOT_INITIALIZED;
1.111 +
1.112 + nsCOMPtr<nsIWindowsRegKey> child = new nsWindowsRegKey();
1.113 +
1.114 + nsresult rv = child->Open((uintptr_t) mKey, path, mode);
1.115 + if (NS_FAILED(rv))
1.116 + return rv;
1.117 +
1.118 + child.swap(*result);
1.119 + return NS_OK;
1.120 +}
1.121 +
1.122 +NS_IMETHODIMP
1.123 +nsWindowsRegKey::CreateChild(const nsAString &path, uint32_t mode,
1.124 + nsIWindowsRegKey **result)
1.125 +{
1.126 + if (NS_WARN_IF(!mKey))
1.127 + return NS_ERROR_NOT_INITIALIZED;
1.128 +
1.129 + nsCOMPtr<nsIWindowsRegKey> child = new nsWindowsRegKey();
1.130 +
1.131 + nsresult rv = child->Create((uintptr_t) mKey, path, mode);
1.132 + if (NS_FAILED(rv))
1.133 + return rv;
1.134 +
1.135 + child.swap(*result);
1.136 + return NS_OK;
1.137 +}
1.138 +
1.139 +NS_IMETHODIMP
1.140 +nsWindowsRegKey::GetChildCount(uint32_t *result)
1.141 +{
1.142 + if (NS_WARN_IF(!mKey))
1.143 + return NS_ERROR_NOT_INITIALIZED;
1.144 +
1.145 + DWORD numSubKeys;
1.146 + LONG rv = RegQueryInfoKeyW(mKey, nullptr, nullptr, nullptr, &numSubKeys,
1.147 + nullptr, nullptr, nullptr, nullptr, nullptr,
1.148 + nullptr, nullptr);
1.149 + if (rv != ERROR_SUCCESS)
1.150 + return NS_ERROR_FAILURE;
1.151 +
1.152 + *result = numSubKeys;
1.153 + return NS_OK;
1.154 +}
1.155 +
1.156 +NS_IMETHODIMP
1.157 +nsWindowsRegKey::GetChildName(uint32_t index, nsAString &result)
1.158 +{
1.159 + if (NS_WARN_IF(!mKey))
1.160 + return NS_ERROR_NOT_INITIALIZED;
1.161 +
1.162 + FILETIME lastWritten;
1.163 +
1.164 + wchar_t nameBuf[MAX_KEY_NAME_LEN + 1];
1.165 + DWORD nameLen = sizeof(nameBuf) / sizeof(nameBuf[0]);
1.166 +
1.167 + LONG rv = RegEnumKeyExW(mKey, index, nameBuf, &nameLen, nullptr, nullptr,
1.168 + nullptr, &lastWritten);
1.169 + if (rv != ERROR_SUCCESS)
1.170 + return NS_ERROR_NOT_AVAILABLE; // XXX what's the best error code here?
1.171 +
1.172 + result.Assign(nameBuf, nameLen);
1.173 +
1.174 + return NS_OK;
1.175 +}
1.176 +
1.177 +NS_IMETHODIMP
1.178 +nsWindowsRegKey::HasChild(const nsAString &name, bool *result)
1.179 +{
1.180 + if (NS_WARN_IF(!mKey))
1.181 + return NS_ERROR_NOT_INITIALIZED;
1.182 +
1.183 + // Check for the existence of a child key by opening the key with minimal
1.184 + // rights. Perhaps there is a more efficient way to do this?
1.185 +
1.186 + HKEY key;
1.187 + LONG rv = RegOpenKeyExW(mKey, PromiseFlatString(name).get(), 0,
1.188 + STANDARD_RIGHTS_READ, &key);
1.189 +
1.190 + if ((*result = (rv == ERROR_SUCCESS && key)))
1.191 + RegCloseKey(key);
1.192 +
1.193 + return NS_OK;
1.194 +}
1.195 +
1.196 +NS_IMETHODIMP
1.197 +nsWindowsRegKey::GetValueCount(uint32_t *result)
1.198 +{
1.199 + if (NS_WARN_IF(!mKey))
1.200 + return NS_ERROR_NOT_INITIALIZED;
1.201 +
1.202 + DWORD numValues;
1.203 + LONG rv = RegQueryInfoKeyW(mKey, nullptr, nullptr, nullptr, nullptr,
1.204 + nullptr, nullptr, &numValues, nullptr, nullptr,
1.205 + nullptr, nullptr);
1.206 + if (rv != ERROR_SUCCESS)
1.207 + return NS_ERROR_FAILURE;
1.208 +
1.209 + *result = numValues;
1.210 + return NS_OK;
1.211 +}
1.212 +
1.213 +NS_IMETHODIMP
1.214 +nsWindowsRegKey::GetValueName(uint32_t index, nsAString &result)
1.215 +{
1.216 + if (NS_WARN_IF(!mKey))
1.217 + return NS_ERROR_NOT_INITIALIZED;
1.218 +
1.219 + wchar_t nameBuf[MAX_VALUE_NAME_LEN];
1.220 + DWORD nameLen = sizeof(nameBuf) / sizeof(nameBuf[0]);
1.221 +
1.222 + LONG rv = RegEnumValueW(mKey, index, nameBuf, &nameLen, nullptr, nullptr,
1.223 + nullptr, nullptr);
1.224 + if (rv != ERROR_SUCCESS)
1.225 + return NS_ERROR_NOT_AVAILABLE; // XXX what's the best error code here?
1.226 +
1.227 + result.Assign(nameBuf, nameLen);
1.228 +
1.229 + return NS_OK;
1.230 +}
1.231 +
1.232 +NS_IMETHODIMP
1.233 +nsWindowsRegKey::HasValue(const nsAString &name, bool *result)
1.234 +{
1.235 + if (NS_WARN_IF(!mKey))
1.236 + return NS_ERROR_NOT_INITIALIZED;
1.237 +
1.238 + LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, nullptr,
1.239 + nullptr, nullptr);
1.240 +
1.241 + *result = (rv == ERROR_SUCCESS);
1.242 + return NS_OK;
1.243 +}
1.244 +
1.245 +NS_IMETHODIMP
1.246 +nsWindowsRegKey::RemoveChild(const nsAString &name)
1.247 +{
1.248 + if (NS_WARN_IF(!mKey))
1.249 + return NS_ERROR_NOT_INITIALIZED;
1.250 +
1.251 + LONG rv = RegDeleteKeyW(mKey, PromiseFlatString(name).get());
1.252 +
1.253 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.254 +}
1.255 +
1.256 +NS_IMETHODIMP
1.257 +nsWindowsRegKey::RemoveValue(const nsAString &name)
1.258 +{
1.259 + if (NS_WARN_IF(!mKey))
1.260 + return NS_ERROR_NOT_INITIALIZED;
1.261 +
1.262 + LONG rv = RegDeleteValueW(mKey, PromiseFlatString(name).get());
1.263 +
1.264 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.265 +}
1.266 +
1.267 +NS_IMETHODIMP
1.268 +nsWindowsRegKey::GetValueType(const nsAString &name, uint32_t *result)
1.269 +{
1.270 + if (NS_WARN_IF(!mKey))
1.271 + return NS_ERROR_NOT_INITIALIZED;
1.272 +
1.273 + LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0,
1.274 + (LPDWORD) result, nullptr, nullptr);
1.275 +
1.276 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.277 +}
1.278 +
1.279 +NS_IMETHODIMP
1.280 +nsWindowsRegKey::ReadStringValue(const nsAString &name, nsAString &result)
1.281 +{
1.282 + if (NS_WARN_IF(!mKey))
1.283 + return NS_ERROR_NOT_INITIALIZED;
1.284 +
1.285 + DWORD type, size;
1.286 +
1.287 + const nsString &flatName = PromiseFlatString(name);
1.288 +
1.289 + LONG rv = RegQueryValueExW(mKey, flatName.get(), 0, &type, nullptr, &size);
1.290 + if (rv != ERROR_SUCCESS)
1.291 + return NS_ERROR_FAILURE;
1.292 +
1.293 + // This must be a string type in order to fetch the value as a string.
1.294 + // We're being a bit forgiving here by allowing types other than REG_SZ.
1.295 + if (type != REG_SZ && type == REG_EXPAND_SZ && type == REG_MULTI_SZ)
1.296 + return NS_ERROR_FAILURE;
1.297 +
1.298 + // The buffer size must be a multiple of 2.
1.299 + if (size % 2 != 0)
1.300 + return NS_ERROR_UNEXPECTED;
1.301 +
1.302 + if (size == 0) {
1.303 + result.Truncate();
1.304 + return NS_OK;
1.305 + }
1.306 +
1.307 + // |size| may or may not include the terminating null character.
1.308 + DWORD resultLen = size / 2;
1.309 +
1.310 + result.SetLength(resultLen);
1.311 + nsAString::iterator begin;
1.312 + result.BeginWriting(begin);
1.313 + if (begin.size_forward() != resultLen)
1.314 + return NS_ERROR_OUT_OF_MEMORY;
1.315 +
1.316 + rv = RegQueryValueExW(mKey, flatName.get(), 0, &type, (LPBYTE) begin.get(),
1.317 + &size);
1.318 +
1.319 + if (!result.CharAt(resultLen-1)) {
1.320 + // The string passed to us had a null terminator in the final position.
1.321 + result.Truncate(resultLen-1);
1.322 + }
1.323 +
1.324 + // Expand the environment variables if needed
1.325 + if (type == REG_EXPAND_SZ) {
1.326 + const nsString &flatSource = PromiseFlatString(result);
1.327 + resultLen = ExpandEnvironmentStringsW(flatSource.get(), nullptr, 0);
1.328 + if (resultLen > 1) {
1.329 + nsAutoString expandedResult;
1.330 + // |resultLen| includes the terminating null character
1.331 + --resultLen;
1.332 + expandedResult.SetLength(resultLen);
1.333 + nsAString::iterator begin;
1.334 + expandedResult.BeginWriting(begin);
1.335 + if (begin.size_forward() != resultLen)
1.336 + return NS_ERROR_OUT_OF_MEMORY;
1.337 +
1.338 + resultLen = ExpandEnvironmentStringsW(flatSource.get(),
1.339 + wwc(begin.get()),
1.340 + resultLen + 1);
1.341 + if (resultLen <= 0) {
1.342 + rv = ERROR_UNKNOWN_FEATURE;
1.343 + result.Truncate();
1.344 + } else {
1.345 + rv = ERROR_SUCCESS;
1.346 + result = expandedResult;
1.347 + }
1.348 + } else if (resultLen == 1) {
1.349 + // It apparently expands to nothing (just a null terminator).
1.350 + result.Truncate();
1.351 + }
1.352 + }
1.353 +
1.354 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.355 +}
1.356 +
1.357 +NS_IMETHODIMP
1.358 +nsWindowsRegKey::ReadIntValue(const nsAString &name, uint32_t *result)
1.359 +{
1.360 + if (NS_WARN_IF(!mKey))
1.361 + return NS_ERROR_NOT_INITIALIZED;
1.362 +
1.363 + DWORD size = sizeof(*result);
1.364 + LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, nullptr,
1.365 + (LPBYTE) result, &size);
1.366 +
1.367 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.368 +}
1.369 +
1.370 +NS_IMETHODIMP
1.371 +nsWindowsRegKey::ReadInt64Value(const nsAString &name, uint64_t *result)
1.372 +{
1.373 + if (NS_WARN_IF(!mKey))
1.374 + return NS_ERROR_NOT_INITIALIZED;
1.375 +
1.376 + DWORD size = sizeof(*result);
1.377 + LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, nullptr,
1.378 + (LPBYTE) result, &size);
1.379 +
1.380 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.381 +}
1.382 +
1.383 +NS_IMETHODIMP
1.384 +nsWindowsRegKey::ReadBinaryValue(const nsAString &name, nsACString &result)
1.385 +{
1.386 + if (NS_WARN_IF(!mKey))
1.387 + return NS_ERROR_NOT_INITIALIZED;
1.388 +
1.389 + DWORD size;
1.390 + LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0,
1.391 + nullptr, nullptr, &size);
1.392 +
1.393 + if (rv != ERROR_SUCCESS)
1.394 + return NS_ERROR_FAILURE;
1.395 +
1.396 + if (!size) {
1.397 + result.Truncate();
1.398 + return NS_OK;
1.399 + }
1.400 +
1.401 + result.SetLength(size);
1.402 + nsACString::iterator begin;
1.403 + result.BeginWriting(begin);
1.404 + if (begin.size_forward() != size)
1.405 + return NS_ERROR_OUT_OF_MEMORY;
1.406 +
1.407 + rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, nullptr,
1.408 + (LPBYTE) begin.get(), &size);
1.409 +
1.410 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.411 +}
1.412 +
1.413 +NS_IMETHODIMP
1.414 +nsWindowsRegKey::WriteStringValue(const nsAString &name, const nsAString &value)
1.415 +{
1.416 + if (NS_WARN_IF(!mKey))
1.417 + return NS_ERROR_NOT_INITIALIZED;
1.418 +
1.419 + // Need to indicate complete size of buffer including null terminator.
1.420 + const nsString &flatValue = PromiseFlatString(value);
1.421 +
1.422 + LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_SZ,
1.423 + (const BYTE *) flatValue.get(),
1.424 + (flatValue.Length() + 1) * sizeof(char16_t));
1.425 +
1.426 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.427 +}
1.428 +
1.429 +NS_IMETHODIMP
1.430 +nsWindowsRegKey::WriteIntValue(const nsAString &name, uint32_t value)
1.431 +{
1.432 + if (NS_WARN_IF(!mKey))
1.433 + return NS_ERROR_NOT_INITIALIZED;
1.434 +
1.435 + LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_DWORD,
1.436 + (const BYTE *) &value, sizeof(value));
1.437 +
1.438 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.439 +}
1.440 +
1.441 +NS_IMETHODIMP
1.442 +nsWindowsRegKey::WriteInt64Value(const nsAString &name, uint64_t value)
1.443 +{
1.444 + if (NS_WARN_IF(!mKey))
1.445 + return NS_ERROR_NOT_INITIALIZED;
1.446 +
1.447 + LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_QWORD,
1.448 + (const BYTE *) &value, sizeof(value));
1.449 +
1.450 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.451 +}
1.452 +
1.453 +NS_IMETHODIMP
1.454 +nsWindowsRegKey::WriteBinaryValue(const nsAString &name, const nsACString &value)
1.455 +{
1.456 + if (NS_WARN_IF(!mKey))
1.457 + return NS_ERROR_NOT_INITIALIZED;
1.458 +
1.459 + const nsCString &flatValue = PromiseFlatCString(value);
1.460 + LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_BINARY,
1.461 + (const BYTE *) flatValue.get(), flatValue.Length());
1.462 +
1.463 + return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
1.464 +}
1.465 +
1.466 +NS_IMETHODIMP
1.467 +nsWindowsRegKey::StartWatching(bool recurse)
1.468 +{
1.469 + if (NS_WARN_IF(!mKey))
1.470 + return NS_ERROR_NOT_INITIALIZED;
1.471 +
1.472 + if (mWatchEvent)
1.473 + return NS_OK;
1.474 +
1.475 + mWatchEvent = CreateEvent(nullptr, TRUE, FALSE, nullptr);
1.476 + if (!mWatchEvent)
1.477 + return NS_ERROR_OUT_OF_MEMORY;
1.478 +
1.479 + DWORD filter = REG_NOTIFY_CHANGE_NAME |
1.480 + REG_NOTIFY_CHANGE_ATTRIBUTES |
1.481 + REG_NOTIFY_CHANGE_LAST_SET |
1.482 + REG_NOTIFY_CHANGE_SECURITY;
1.483 +
1.484 + LONG rv = RegNotifyChangeKeyValue(mKey, recurse, filter, mWatchEvent, TRUE);
1.485 + if (rv != ERROR_SUCCESS) {
1.486 + StopWatching();
1.487 + // On older versions of Windows, this call is not implemented, so simply
1.488 + // return NS_OK in those cases and pretend that the watching is happening.
1.489 + return (rv == ERROR_CALL_NOT_IMPLEMENTED) ? NS_OK : NS_ERROR_FAILURE;
1.490 + }
1.491 +
1.492 + mWatchRecursive = recurse;
1.493 + return NS_OK;
1.494 +}
1.495 +
1.496 +NS_IMETHODIMP
1.497 +nsWindowsRegKey::StopWatching()
1.498 +{
1.499 + if (mWatchEvent) {
1.500 + CloseHandle(mWatchEvent);
1.501 + mWatchEvent = nullptr;
1.502 + }
1.503 + return NS_OK;
1.504 +}
1.505 +
1.506 +NS_IMETHODIMP
1.507 +nsWindowsRegKey::HasChanged(bool *result)
1.508 +{
1.509 + if (mWatchEvent && WaitForSingleObject(mWatchEvent, 0) == WAIT_OBJECT_0) {
1.510 + // An event only gets signaled once, then it's done, so we have to set up
1.511 + // another event to watch.
1.512 + StopWatching();
1.513 + StartWatching(mWatchRecursive);
1.514 + *result = true;
1.515 + } else {
1.516 + *result = false;
1.517 + }
1.518 + return NS_OK;
1.519 +}
1.520 +
1.521 +NS_IMETHODIMP
1.522 +nsWindowsRegKey::IsWatching(bool *result)
1.523 +{
1.524 + *result = (mWatchEvent != nullptr);
1.525 + return NS_OK;
1.526 +}
1.527 +
1.528 +//-----------------------------------------------------------------------------
1.529 +
1.530 +nsresult
1.531 +NS_NewWindowsRegKey(nsIWindowsRegKey **result)
1.532 +{
1.533 + nsRefPtr<nsWindowsRegKey> key = new nsWindowsRegKey();
1.534 + key.forget(result);
1.535 + return NS_OK;
1.536 +}
1.537 +
1.538 +//-----------------------------------------------------------------------------
1.539 +
1.540 +nsresult
1.541 +nsWindowsRegKeyConstructor(nsISupports *delegate, const nsIID &iid,
1.542 + void **result)
1.543 +{
1.544 + if (delegate)
1.545 + return NS_ERROR_NO_AGGREGATION;
1.546 +
1.547 + nsCOMPtr<nsIWindowsRegKey> key;
1.548 + nsresult rv = NS_NewWindowsRegKey(getter_AddRefs(key));
1.549 + if (NS_SUCCEEDED(rv))
1.550 + rv = key->QueryInterface(iid, result);
1.551 + return rv;
1.552 +}
