sapi: Implement ISpObjectToken OpenKey.

dlls/sapi/tests/token.c

@@ -194,6 +194,7 @@ static void test_default_token_id(void)
 static void test_object_token(void)
 {
     ISpObjectToken *token;
+    ISpDataKey *sub_key;
     HRESULT hr;
     LPWSTR tempW, token_id;
     ISpObjectTokenCategory *cat;
@@ -253,6 +254,13 @@ static void test_object_token(void)
         CoTaskMemFree( tempW );
     }
 
+    hr = ISpObjectToken_OpenKey(token, L"Non-exist", &sub_key);
+    ok( hr == SPERR_NOT_FOUND, "got %08lx\n", hr );
+
+    hr = ISpObjectToken_OpenKey(token, L"Classes", &sub_key);
+    ok( hr == S_OK, "got %08lx\n", hr );
+    ISpDataKey_Release(sub_key);
+
     cat = (LPVOID)0xdeadbeef;
     hr = ISpObjectToken_GetCategory( token, &cat );
     todo_wine ok( hr == SPERR_INVALID_REGISTRY_KEY, "got %08lx\n", hr );

dlls/sapi/token.c

@@ -931,8 +931,37 @@ static HRESULT WINAPI token_GetDWORD( ISpObjectToken *iface,
 static HRESULT WINAPI token_OpenKey( ISpObjectToken *iface,
                                      LPCWSTR name, ISpDataKey **sub_key )
 {
-    FIXME( "stub\n" );
-    return E_NOTIMPL;
+    struct object_token *This = impl_from_ISpObjectToken( iface );
+    ISpRegDataKey *spregkey;
+    HRESULT hr;
+    HKEY key;
+    LONG ret;
+
+    TRACE( "%p, %s, %p\n", This, debugstr_w(name), sub_key );
+
+    ret = RegOpenKeyExW (This->token_key, name, 0, KEY_ALL_ACCESS, &key);
+    if (ret != ERROR_SUCCESS)
+        return SPERR_NOT_FOUND;
+
+    hr = data_key_create(NULL, &IID_ISpRegDataKey, (void**)&spregkey);
+    if (FAILED(hr))
+    {
+        RegCloseKey(key);
+        return hr;
+    }
+
+    hr = ISpRegDataKey_SetKey(spregkey, key, FALSE);
+    if (FAILED(hr))
+    {
+        RegCloseKey(key);
+        ISpRegDataKey_Release(spregkey);
+        return hr;
+    }
+
+    hr = ISpRegDataKey_QueryInterface(spregkey, &IID_ISpDataKey, (void**)sub_key);
+    ISpRegDataKey_Release(spregkey);
+
+    return hr;
 }
 
 static HRESULT WINAPI token_CreateKey( ISpObjectToken *iface,