4.1

4 files changed, 499 insertions, 0 deletions

diff --git a/lib/Thumbnail/Thumbnail.vcxproj b/lib/Thumbnail/Thumbnail.vcxproj
new file mode 100644
index 00000000..e3909ff8
--- /dev/null
+++ b/lib/Thumbnail/Thumbnail.vcxproj
@@ -0,0 +1,239 @@
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+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{70394AEF-5897-4911-AFA1-82EAF0581EFA}</ProjectGuid>
+    <RootNamespace>ShadowDll</RootNamespace>
+    <Keyword>Win32Proj</Keyword>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <CharacterSet>Unicode</CharacterSet>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>Windows7.1SDK</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <CharacterSet>Unicode</CharacterSet>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>Windows7.1SDK</PlatformToolset>
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>Windows7.1SDK</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
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+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup>
+    <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">OBJ\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">OBJ\$(ProjectName)_$(Configuration)_$(Platform)\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</LinkIncremental>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">OBJ\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">OBJ\$(ProjectName)_$(Configuration)_$(Platform)\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</LinkIncremental>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">.\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">OBJ\$(ProjectName)_$(Configuration)_$(Platform)\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">.\</OutDir>
+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">OBJ\$(ProjectName)_$(Configuration)_$(Platform)\</IntDir>
+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkIncremental>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Thumbnail_$(Platform)</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Thumbnail_$(Platform)</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Thumbnail_$(Platform)</TargetName>
+    <TargetName Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Thumbnail_$(Platform)</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <BuildLog>
+      <Path>$(IntDir)Build.html</Path>
+    </BuildLog>
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_WINDOWS;_USRDLL;THUMBNAIL_DLL_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild>true</MinimalRebuild>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
+      <DisableSpecificWarnings>4100</DisableSpecificWarnings>
+      <AdditionalIncludeDirectories>../..</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <OutputFile>$(OutDir)$(TargetName)$(TargetExt)</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <ProgramDatabaseFile>$(IntDir)$(TargetName).pdb</ProgramDatabaseFile>
+      <SubSystem>Windows</SubSystem>
+      <ProfileGuidedDatabase>
+      </ProfileGuidedDatabase>
+      <ImportLibrary>$(IntDir)$(TargetName).lib</ImportLibrary>
+      <TargetMachine>MachineX86</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <BuildLog>
+      <Path>$(IntDir)Build.html</Path>
+    </BuildLog>
+    <Midl>
+      <TargetEnvironment>X64</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_WINDOWS;_USRDLL;THUMBNAIL_DLL_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild>true</MinimalRebuild>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <DisableSpecificWarnings>4100</DisableSpecificWarnings>
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+    <Link>
+      <OutputFile>$(OutDir)$(TargetName)$(TargetExt)</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <ProgramDatabaseFile>$(IntDir)$(TargetName).pdb</ProgramDatabaseFile>
+      <SubSystem>Windows</SubSystem>
+      <ProfileGuidedDatabase>
+      </ProfileGuidedDatabase>
+      <ImportLibrary>$(IntDir)$(TargetName).lib</ImportLibrary>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <BuildLog>
+      <Path>$(IntDir)Build.html</Path>
+    </BuildLog>
+    <ClCompile>
+      <Optimization>MaxSpeed</Optimization>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_WINDOWS;_USRDLL;THUMBNAIL_DLL_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <DisableSpecificWarnings>4100</DisableSpecificWarnings>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <AdditionalIncludeDirectories>../..</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <OutputFile>$(OutDir)$(TargetName)$(TargetExt)</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+      <OptimizeReferences>true</OptimizeReferences>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+      <ProfileGuidedDatabase>
+      </ProfileGuidedDatabase>
+      <ImportLibrary>$(IntDir)$(TargetName).lib</ImportLibrary>
+      <TargetMachine>MachineX86</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <BuildLog>
+      <Path>$(IntDir)Build.html</Path>
+    </BuildLog>
+    <Midl>
+      <TargetEnvironment>X64</TargetEnvironment>
+    </Midl>
+    <ClCompile>
+      <Optimization>MaxSpeed</Optimization>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_WINDOWS;_USRDLL;THUMBNAIL_DLL_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <DisableSpecificWarnings>4100</DisableSpecificWarnings>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <AdditionalIncludeDirectories>../..</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <OutputFile>$(OutDir)$(TargetName)$(TargetExt)</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+      <OptimizeReferences>true</OptimizeReferences>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+      <ProfileGuidedDatabase>
+      </ProfileGuidedDatabase>
+      <ImportLibrary>$(IntDir)$(TargetName).lib</ImportLibrary>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="dll_main.cpp">
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+      </PrecompiledHeader>
+      <CompileAsManaged Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</CompileAsManaged>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+      </PrecompiledHeader>
+      <CompileAsManaged Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</CompileAsManaged>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+      </PrecompiledHeader>
+      <CompileAsManaged Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</CompileAsManaged>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+      </PrecompiledHeader>
+      <CompileAsManaged Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</CompileAsManaged>
+    </ClCompile>
+    <ClCompile Include="thumbnail.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="thumbnail.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/lib/Thumbnail/dll_main.cpp b/lib/Thumbnail/dll_main.cpp
new file mode 100644
index 00000000..3805c99d
--- /dev/null
+++ b/lib/Thumbnail/dll_main.cpp
@@ -0,0 +1,25 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+//optional: add init/teardown logic here
+BOOL APIENTRY DllMain(HINSTANCE hinstDLL,
+                      DWORD     fdwReason,
+                      LPVOID    lpvReserved)
+{
+    switch (fdwReason)
+    {
+        case DLL_PROCESS_ATTACH:
+        case DLL_PROCESS_DETACH:
+        case DLL_THREAD_ATTACH:
+        case DLL_THREAD_DETACH:
+            break;
+    }
+    return TRUE;
+}
diff --git a/lib/Thumbnail/thumbnail.cpp b/lib/Thumbnail/thumbnail.cpp
new file mode 100644
index 00000000..b8d00c38
--- /dev/null
+++ b/lib/Thumbnail/thumbnail.cpp
@@ -0,0 +1,167 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#include "thumbnail.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include "windows.h"
+
+#define STRICT_TYPED_ITEMIDS //better type safety for IDLists
+#include <Shlobj.h>
+
+#include <Shellapi.h>
+#include <CommonControls.h>
+#include <zen/com_ptr.h>
+#include <zen/string_tools.h>
+#include <string>
+#include <zen/scope_guard.h>
+
+using namespace zen;
+
+
+thumb::HICON thumb::getThumbnail(const wchar_t* filename, int requestedSize) //return 0 on failure, caller takes ownership!
+{
+    const std::wstring filenameStr(filename);
+
+    ComPtr<IShellFolder> shellFolder;
+    {
+        HRESULT hr = ::SHGetDesktopFolder(shellFolder.init());
+        if (FAILED(hr) || !shellFolder)
+            return NULL;
+    }
+
+    PIDLIST_RELATIVE pidlFolder = NULL;
+    {
+        const std::wstring& pathName = beforeLast(filenameStr, '\\');
+        HRESULT hr = shellFolder->ParseDisplayName(NULL,             // [in]       HWND hwnd,
+                                                   NULL,             // [in]       IBindCtx *pbc,
+                                                   const_cast<LPWSTR>(pathName.c_str()), // [in]       LPWSTR pszDisplayName,
+                                                   NULL,             // [out]      ULONG *pchEaten,
+                                                   &pidlFolder,      // [out]      PIDLIST_RELATIVE* ppidl,
+                                                   NULL);            // [in, out]  ULONG *pdwAttributes
+        if (FAILED(hr) || !pidlFolder)
+            return NULL;
+    }
+    ZEN_ON_BLOCK_EXIT(::ILFree(pidlFolder)); //older version: ::CoTaskMemFree
+
+    ComPtr<IShellFolder> imageFolder;
+    {
+        HRESULT hr = shellFolder->BindToObject(pidlFolder, // [in]   PCUIDLIST_RELATIVE pidl,
+                                               NULL,
+                                               IID_PPV_ARGS(imageFolder.init()));
+        if (FAILED(hr) || !imageFolder)
+            return NULL;
+    }
+
+    PIDLIST_RELATIVE pidImage = NULL;
+    {
+        const std::wstring& shortName = afterLast(filenameStr, '\\');
+        HRESULT hr = imageFolder->ParseDisplayName(NULL,             // [in]       HWND hwnd,
+                                                   NULL,             // [in]       IBindCtx *pbc,
+                                                   const_cast<LPWSTR>(shortName.c_str()), // [in]       LPWSTR pszDisplayName,
+                                                   NULL,             // [out]      ULONG *pchEaten,
+                                                   &pidImage,        // [out]      PIDLIST_RELATIVE *ppidl,
+                                                   NULL);            // [in, out]  ULONG *pdwAttributes
+        if (FAILED(hr) || !pidImage)
+            return NULL;
+    }
+    ZEN_ON_BLOCK_EXIT(::ILFree(pidImage)); //older version: ::CoTaskMemFree
+
+    ComPtr<IExtractImage> extractImage;
+    {
+        PCUITEMID_CHILD_ARRAY pidlIn = reinterpret_cast<PCUITEMID_CHILD_ARRAY>(&pidImage);
+        //this is where STRICT_TYPED_ITEMIDS gets us ;)
+
+        HRESULT hr = imageFolder->GetUIObjectOf(NULL,              // [in]       HWND hwndOwner,
+                                                1,                 // [in]       UINT cidl,
+                                                pidlIn,            // [in]       PCUITEMID_CHILD_ARRAY apidl,
+                                                IID_IExtractImage, // [in]       REFIID riid,
+                                                NULL,              // [in, out]  UINT *rgfReserved,
+                                                reinterpret_cast<void**>(extractImage.init())); // [out]      void **ppv
+        if (FAILED(hr) || !extractImage)
+            return NULL;
+    }
+
+    {
+        wchar_t pathBuffer[MAX_PATH];
+        DWORD priority = 0;
+        const SIZE prgSize = { requestedSize, requestedSize }; //preferred size only!
+        DWORD clrDepth = 32;
+        DWORD flags = IEIFLAG_SCREEN | IEIFLAG_OFFLINE;
+
+        HRESULT hr = extractImage->GetLocation(pathBuffer, // [out]      LPWSTR pszPathBuffer,
+                                               MAX_PATH,   // [in]       DWORD cchMax,
+                                               &priority,  // [out]      DWORD *pdwPriority,
+                                               &prgSize,   // [in]       const SIZE *prgSize,
+                                               clrDepth,   // [in]       DWORD dwRecClrDepth,
+                                               &flags);    // [in, out]  DWORD *pdwFlags
+        if (FAILED(hr))
+            return NULL;
+    }
+
+    HBITMAP bitmap = NULL;
+    {
+        HRESULT hr = extractImage->Extract(&bitmap);
+        if (FAILED(hr) || !bitmap)
+            return NULL;
+    }
+    ZEN_ON_BLOCK_EXIT(::DeleteObject(bitmap));
+
+
+    BITMAP bmpInfo = {};
+    if (::GetObject(bitmap,          //__in   HGDIOBJ hgdiobj,
+                    sizeof(bmpInfo), //__in   int cbBuffer,
+                    &bmpInfo) == 0)  //__out  LPVOID lpvObject
+        return NULL;
+
+    HBITMAP bitmapMask = ::CreateCompatibleBitmap(::GetDC(NULL), bmpInfo.bmWidth, bmpInfo.bmHeight);
+    if (bitmapMask == 0)
+        return NULL;
+    ZEN_ON_BLOCK_EXIT(::DeleteObject(bitmapMask));
+
+    ICONINFO iconInfo = {};
+    iconInfo.fIcon    = true;
+    iconInfo.hbmColor = bitmap;
+    iconInfo.hbmMask  = bitmapMask;
+
+    return ::CreateIconIndirect(&iconInfo);
+}
+
+
+thumb::HICON thumb::getIconByIndex(int iconIndex, int shilIconType) //return 0 on failure, caller takes ownership!
+{
+    //Note: using IExtractIcon::Extract is *no* alternative, just as ::SHGetFileInfo(), it only supports small (16x16) and large (32x32) icons
+
+    ComPtr<IImageList> imageList; //perf: 0,12 µs only to get the image list
+    {
+        HRESULT hr = ::SHGetImageList(shilIconType, //__in   int iImageList,
+                                      IID_PPV_ARGS(imageList.init()));
+        if (FAILED(hr) || !imageList)
+            return NULL;
+    }
+
+    bool hasAlpha = false; //perf: 0,14 µs
+    {
+        DWORD flags = 0;
+        HRESULT hr = imageList->GetItemFlags(iconIndex, //[in]   int i,
+                                             &flags);   //[out]  DWORD *dwFlags
+        if (SUCCEEDED(hr))
+            hasAlpha = flags & ILIF_ALPHA;
+    }
+
+    ::HICON hIcon = NULL; //perf: 1,5 ms - the dominant block
+    {
+        HRESULT hr = imageList->GetIcon(iconIndex, // [in]   int i,
+                                        hasAlpha ? ILD_IMAGE : ILD_NORMAL, // [in]   UINT flags,
+                                        //ILD_IMAGE -> do not draw mask - fixes glitch with ILD_NORMAL where both mask *and* alpha channel are applied, e.g. for ffs_batch and folder icon
+                                        //other flags: http://msdn.microsoft.com/en-us/library/windows/desktop/bb775230(v=vs.85).aspx
+                                        &hIcon); // [out]  HICON *picon
+        if (FAILED(hr) || !hIcon)
+            return NULL;
+    }
+
+    return hIcon;
+}
\ No newline at end of file
diff --git a/lib/Thumbnail/thumbnail.h b/lib/Thumbnail/thumbnail.h
new file mode 100644
index 00000000..3feec275
--- /dev/null
+++ b/lib/Thumbnail/thumbnail.h
@@ -0,0 +1,68 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#ifndef TASKBAR_SEVEN_DLL_H
+#define TASKBAR_SEVEN_DLL_H
+
+#ifdef THUMBNAIL_DLL_EXPORTS
+#define DLL_FUNCTION_DECLARATION extern "C" __declspec(dllexport)
+#else
+#define DLL_FUNCTION_DECLARATION extern "C" __declspec(dllimport)
+#endif
+
+#include <zen/build_info.h>
+//#include <WinDef.h>
+
+namespace thumb
+{
+/*
+PREREQUISITES:
+
+1. COM must be initialized for the current thread via ::CoInitialize(NULL) or ::CoInitializeEx(NULL, COINIT_APARTMENTTHREADED),
+   but NOT ::CoInitializeEx(NULL, COINIT_MULTITHREADED) -> internal access violation crash!
+2. call ::FileIconInit() on app start to remedy obscure errors like SHELL_E_WRONG_BITDEPTH (0x80270102)
+   for certain file types, e.g. lnk, mpg - required on Windows 7 see http://msdn.microsoft.com/en-us/library/ms683212(v=VS.85).aspx
+*/
+
+/*--------------
+  |declarations|
+  --------------*/
+typedef void* HICON;
+
+DLL_FUNCTION_DECLARATION
+HICON getThumbnail(const wchar_t* filename, int requestedSize); //return 0 on failure, caller takes ownership!
+//Note: not all file types support thumbnails! make sure to implement fallback to file icon!
+
+DLL_FUNCTION_DECLARATION
+HICON getIconByIndex(int iconIndex, int shilIconType); //return 0 on failure, caller takes ownership!
+/*
+"iconType" refers to parameter "iImageList" of ::SHGetImageList(); sample values:
+          SHIL_SMALL      - 16x16, but the size can be customized by the user.
+          SHIL_EXTRALARGE - 48x48, but the size can be customized by the user.
+          SHIL_JUMBO      - 256x256 pixels; Vista and later only
+"iconIndex" as returned by ::SHGetFileInfo()
+*/
+
+/*----------
+  |typedefs|
+  ----------*/
+typedef HICON (*GetThumbnailFct  )(const wchar_t* filename, int requestedSize);
+typedef HICON (*GetIconByIndexFct)(int iconIndex, int shilIconType);
+
+/*--------------
+  |symbol names|
+  --------------*/
+//(use const pointers to ensure internal linkage)
+const char getThumbnailFctName   [] = "getThumbnail";
+const char getIconByIndexFctName [] = "getIconByIndex";
+
+/*---------------
+  |library names|
+  ---------------*/
+inline const wchar_t* getDllName() { return zen::is64BitBuild ? L"Thumbnail_x64.dll" : L"Thumbnail_Win32.dll"; }
+}
+
+#endif //TASKBAR_SEVEN_DLL_H