[gadamopoulos] 73865: [SHELL32] -Cleanup CFSFolder::_LoadDynamicDropTargetHandlerForKey. Inspired by patch by Victor Martinez Calvo. CORE-12799. CID 1401249

Author: gadamopoulos
Date: Mon Feb 20 20:13:22 2017
New Revision: 73865

URL: http://svn.reactos.org/svn/reactos?rev=73865&view=rev
Log:
[SHELL32] -Cleanup CFSFolder::_LoadDynamicDropTargetHandlerForKey. Inspired by patch by Victor Martinez Calvo. CORE-12799. CID 1401249

Modified:
    trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp

Modified: trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/shell32/folders/C...
==============================================================================
--- trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/shell32/folders/CFSFolder.cpp	[iso-8859-1] Mon Feb 20 20:13:22 2017
@@ -1056,38 +1056,41 @@
 {
     TRACE("CFSFolder::_LoadDynamicDropTargetHandlerForKey entered\n");

-    WCHAR wszName[MAX_PATH], *pwszClsid;
+    WCHAR wszName[MAX_PATH];
     DWORD dwSize = sizeof(wszName);
     HRESULT hr;
-
-    if (RegGetValueW(hRootKey, L"shellex\DropHandler", NULL, RRF_RT_REG_SZ, NULL, wszName, &dwSize) == ERROR_SUCCESS)
-    {
-        CLSID clsid;
-        hr = CLSIDFromString(wszName, &clsid);
-        if (hr == S_OK)
-            pwszClsid = wszName;
-
-        if (m_bGroupPolicyActive)
-        {
-            if (RegGetValueW(HKEY_LOCAL_MACHINE,
-                             L"Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved",
-                             pwszClsid,
-                             RRF_RT_REG_SZ,
-                             NULL,
-                             NULL,
-                             NULL) == ERROR_SUCCESS)
-            {
-                hr = _LoadDynamicDropTargetHandler(&clsid, pwcsname, ppvOut);
-            }
-        }
-        else
-        {
-            hr = _LoadDynamicDropTargetHandler(&clsid, pwcsname, ppvOut);
-        }
-    }
-    else
-        return E_FAIL;
-    return hr;
+    LRESULT res;
+
+    res = RegGetValueW(hRootKey, L"shellex\DropHandler", NULL, RRF_RT_REG_SZ, NULL, wszName, &dwSize);
+    if (res != ERROR_SUCCESS)
+        return S_FALSE;
+
+    CLSID clsid;
+    hr = CLSIDFromString(wszName, &clsid);
+    if (FAILED_UNEXPECTEDLY(hr))
+        return hr;
+
+    if (m_bGroupPolicyActive)
+    {
+        res = RegGetValueW(HKEY_LOCAL_MACHINE,
+                           L"Software\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved",
+                           wszName,
+                           RRF_RT_REG_SZ,
+                           NULL,
+                           NULL,
+                           NULL);
+        if (res != ERROR_SUCCESS)
+        {
+            ERR("DropHandler extension %S not approved\n", wszName);
+            return E_FAIL;
+        }
+    }
+
+    hr = _LoadDynamicDropTargetHandler(&clsid, pwcsname, ppvOut);
+    if (FAILED_UNEXPECTEDLY(hr))
+        return hr;
+
+    return S_OK;
 }

HRESULT WINAPI CFSFolder::_LoadDynamicDropTargetHandler(const CLSID *pclsid, LPCWSTR pwcsname, LPVOID *ppvOut)