From d23845620d8b2a4d9b4a8683d764b03ee2683068 Mon Sep 17 00:00:00 2001
From: Dmitry Timoshkov <dmitry@baikal.ru>
Date: Mon, 17 Feb 2014 11:52:46 +0900
Subject: shell32: Implement SHCreateSessionKey.

This implementation is based on the Geoff Chappell description,
and it seems to be enough for the application I have here.
---
 dlls/shell32/shell32.spec     |  1 +
 dlls/shell32/shellreg.c       | 41 +++++++++++++++++++++++++++++++++++++++++
 dlls/shell32/tests/shellole.c |  4 ++--
 3 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/dlls/shell32/shell32.spec b/dlls/shell32/shell32.spec
index 93fd449..abbe6d2 100644
--- a/dlls/shell32/shell32.spec
+++ b/dlls/shell32/shell32.spec
@@ -261,6 +261,7 @@
  704 stdcall -noname GUIDFromStringW(wstr ptr)
  709 stdcall SHGetSetFolderCustomSettings(ptr str long)
  714 stdcall @(ptr) SHELL32_714 # PathIsTemporaryW
+ 723 stdcall SHCreateSessionKey(long ptr)
  727 stdcall SHGetImageList(long ptr ptr)
  730 stdcall -noname RestartDialogEx(long wstr long long)
  743 stdcall SHCreateFileExtractIconW(wstr long ptr ptr)
diff --git a/dlls/shell32/shellreg.c b/dlls/shell32/shellreg.c
index 37f3d9e..96a450e 100644
--- a/dlls/shell32/shellreg.c
+++ b/dlls/shell32/shellreg.c
@@ -147,3 +147,44 @@ HRESULT WINAPI SHRegCloseKey (HKEY hkey)
 	TRACE("%p\n",hkey);
 	return RegCloseKey( hkey );
 }
+
+static const char session_reg_key[] = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\SessionInfo\\";
+
+static BOOL WINAPI create_session_key(INIT_ONCE *once, void *param, void **context)
+{
+    static const char desktop_guid[] = "__wine_display_device_guid";
+    ATOM guid_atom;
+    HKEY hkey_session;
+    LPWSTR session_reg_str = param;
+
+    guid_atom = HandleToULong(GetPropA(GetDesktopWindow(), desktop_guid));
+    if (!guid_atom) return FALSE;
+
+    MultiByteToWideChar(CP_ACP, 0, session_reg_key, sizeof(session_reg_key), session_reg_str, sizeof(session_reg_key));
+
+    if (!GlobalGetAtomNameW(guid_atom, session_reg_str + sizeof(session_reg_key) - 1, 39))
+        return FALSE;
+
+    if (RegCreateKeyExW(HKEY_CURRENT_USER, session_reg_str, 0, NULL,
+                        REG_OPTION_VOLATILE, KEY_WRITE, NULL, &hkey_session, NULL))
+        return FALSE;
+
+    RegCloseKey(hkey_session);
+    TRACE("session key %s\n", debugstr_w(session_reg_str));
+    return TRUE;
+}
+
+/*************************************************************************
+ * SHCreateSessionKey [SHELL32.723]
+ *
+ */
+HRESULT WINAPI SHCreateSessionKey(REGSAM access, HKEY *hkey)
+{
+    static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
+    static WCHAR session_reg_str[sizeof(session_reg_key) + 39];
+
+    InitOnceExecuteOnce(&init_once, create_session_key, session_reg_str, NULL);
+
+    TRACE("using session key %s\n", debugstr_w(session_reg_str));
+    return RegOpenKeyExW(HKEY_CURRENT_USER, session_reg_str, 0, access, hkey);
+}
diff --git a/dlls/shell32/tests/shellole.c b/dlls/shell32/tests/shellole.c
index e8cf744..91125c0 100644
--- a/dlls/shell32/tests/shellole.c
+++ b/dlls/shell32/tests/shellole.c
@@ -876,8 +876,8 @@ if (0) /* crashes on native */
 
     hkey = (HKEY)0xdeadbeef;
     hr = pSHCreateSessionKey(0, &hkey);
-    ok(hr == E_ACCESSDENIED, "got 0x%08x\n", hr);
-    ok(hkey == NULL, "got %p\n", hkey);
+    todo_wine ok(hr == E_ACCESSDENIED, "got 0x%08x\n", hr);
+    todo_wine ok(hkey == NULL, "got %p\n", hkey);
 
     hr = pSHCreateSessionKey(KEY_READ, &hkey);
     ok(hr == S_OK, "got 0x%08x\n", hr);
-- 
2.6.4