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wine/dlls/shell32/assoc.c

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/*
* IQueryAssociations object and helper functions
*
* Copyright 2002 Jon Griffiths
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <assert.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "winreg.h"
#include "objbase.h"
#include "shlguid.h"
#include "shlwapi.h"
#include "shell32_main.h"
#include "ver.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(shell);
/**************************************************************************
* IQueryAssociations {SHELL32}
*
* DESCRIPTION
* This object provides a layer of abstraction over the system registry in
* order to simplify the process of parsing associations between files.
* Associations in this context means the registry entries that link (for
* example) the extension of a file with its description, list of
* applications to open the file with, and actions that can be performed on it
* (the shell displays such information in the context menu of explorer
* when you right-click on a file).
*
* HELPERS
* You can use this object transparently by calling the helper functions
* AssocQueryKeyA(), AssocQueryStringA() and AssocQueryStringByKeyA(). These
* create an IQueryAssociations object, perform the requested actions
* and then dispose of the object. Alternatively, you can create an instance
* of the object using AssocCreate() and call the following methods on it:
*
* METHODS
*/
typedef struct
{
IQueryAssociations IQueryAssociations_iface;
LONG ref;
HKEY hkeySource;
HKEY hkeyProgID;
} IQueryAssociationsImpl;
static inline IQueryAssociationsImpl *impl_from_IQueryAssociations(IQueryAssociations *iface)
{
return CONTAINING_RECORD(iface, IQueryAssociationsImpl, IQueryAssociations_iface);
}
/**************************************************************************
* IQueryAssociations_QueryInterface {SHLWAPI}
*
* See IUnknown_QueryInterface.
*/
static HRESULT WINAPI IQueryAssociations_fnQueryInterface(
IQueryAssociations* iface,
REFIID riid,
LPVOID *ppvObj)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
TRACE("(%p,%s,%p)\n",This, debugstr_guid(riid), ppvObj);
*ppvObj = NULL;
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IQueryAssociations))
{
*ppvObj = This;
IQueryAssociations_AddRef((IQueryAssociations*)*ppvObj);
TRACE("Returning IQueryAssociations (%p)\n", *ppvObj);
return S_OK;
}
TRACE("Returning E_NOINTERFACE\n");
return E_NOINTERFACE;
}
/**************************************************************************
* IQueryAssociations_AddRef {SHLWAPI}
*
* See IUnknown_AddRef.
*/
static ULONG WINAPI IQueryAssociations_fnAddRef(IQueryAssociations *iface)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
return refCount;
}
/**************************************************************************
* IQueryAssociations_Release {SHLWAPI}
*
* See IUnknown_Release.
*/
static ULONG WINAPI IQueryAssociations_fnRelease(IQueryAssociations *iface)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
if (!refCount)
{
TRACE("Destroying IQueryAssociations (%p)\n", This);
RegCloseKey(This->hkeySource);
RegCloseKey(This->hkeyProgID);
HeapFree(GetProcessHeap(), 0, This);
}
return refCount;
}
/**************************************************************************
* IQueryAssociations_Init {SHLWAPI}
*
* Initialise an IQueryAssociations object.
*
* PARAMS
* iface [I] IQueryAssociations interface to initialise
* cfFlags [I] ASSOCF_ flags from "shlwapi.h"
* pszAssoc [I] String for the root key name, or NULL if hkeyProgid is given
* hkeyProgid [I] Handle for the root key, or NULL if pszAssoc is given
* hWnd [I] Reserved, must be NULL.
*
* RETURNS
* Success: S_OK. iface is initialised with the parameters given.
* Failure: An HRESULT error code indicating the error.
*/
static HRESULT WINAPI IQueryAssociations_fnInit(
IQueryAssociations *iface,
ASSOCF cfFlags,
LPCWSTR pszAssoc,
HKEY hkeyProgid,
HWND hWnd)
{
static const WCHAR szProgID[] = {'P','r','o','g','I','D',0};
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
LONG ret;
TRACE("(%p)->(%d,%s,%p,%p)\n", iface,
cfFlags,
debugstr_w(pszAssoc),
hkeyProgid,
hWnd);
if (hWnd != NULL)
FIXME("hwnd != NULL not supported\n");
if (cfFlags != 0)
FIXME("unsupported flags: %x\n", cfFlags);
if (pszAssoc != NULL)
{
ret = RegOpenKeyExW(HKEY_CLASSES_ROOT,
pszAssoc,
0,
KEY_READ,
&This->hkeySource);
if (ret != ERROR_SUCCESS)
return E_FAIL;
/* if this is not a prog id */
if ((*pszAssoc == '.') || (*pszAssoc == '{'))
{
RegOpenKeyExW(This->hkeySource,
szProgID,
0,
KEY_READ,
&This->hkeyProgID);
}
else
This->hkeyProgID = This->hkeySource;
return S_OK;
}
else if (hkeyProgid != NULL)
{
This->hkeyProgID = hkeyProgid;
return S_OK;
}
else
return E_INVALIDARG;
}
static HRESULT ASSOC_GetValue(HKEY hkey, WCHAR ** pszText)
{
DWORD len;
LONG ret;
assert(pszText);
ret = RegQueryValueExW(hkey, NULL, 0, NULL, NULL, &len);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
if (!len)
return E_FAIL;
*pszText = HeapAlloc(GetProcessHeap(), 0, len);
if (!*pszText)
return E_OUTOFMEMORY;
ret = RegQueryValueExW(hkey, NULL, 0, NULL, (LPBYTE)*pszText,
&len);
if (ret != ERROR_SUCCESS)
{
HeapFree(GetProcessHeap(), 0, *pszText);
return HRESULT_FROM_WIN32(ret);
}
return S_OK;
}
static HRESULT ASSOC_GetCommand(IQueryAssociationsImpl *This,
LPCWSTR pszExtra, WCHAR **ppszCommand)
{
HKEY hkeyCommand;
HKEY hkeyFile;
HKEY hkeyShell;
HKEY hkeyVerb;
HRESULT hr;
LONG ret;
WCHAR * pszExtraFromReg = NULL;
WCHAR * pszFileType;
static const WCHAR commandW[] = { 'c','o','m','m','a','n','d',0 };
static const WCHAR shellW[] = { 's','h','e','l','l',0 };
hr = ASSOC_GetValue(This->hkeySource, &pszFileType);
if (FAILED(hr))
return hr;
ret = RegOpenKeyExW(HKEY_CLASSES_ROOT, pszFileType, 0, KEY_READ, &hkeyFile);
HeapFree(GetProcessHeap(), 0, pszFileType);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
ret = RegOpenKeyExW(hkeyFile, shellW, 0, KEY_READ, &hkeyShell);
RegCloseKey(hkeyFile);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
if (!pszExtra)
{
hr = ASSOC_GetValue(hkeyShell, &pszExtraFromReg);
/* if no default action */
if (hr == E_FAIL || hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND))
{
DWORD rlen;
ret = RegQueryInfoKeyW(hkeyShell, 0, 0, 0, 0, &rlen, 0, 0, 0, 0, 0, 0);
if (ret != ERROR_SUCCESS)
{
RegCloseKey(hkeyShell);
return HRESULT_FROM_WIN32(ret);
}
rlen++;
pszExtraFromReg = HeapAlloc(GetProcessHeap(), 0, rlen * sizeof(WCHAR));
if (!pszExtraFromReg)
{
RegCloseKey(hkeyShell);
return E_OUTOFMEMORY;
}
ret = RegEnumKeyExW(hkeyShell, 0, pszExtraFromReg, &rlen, 0, NULL, NULL, NULL);
if (ret != ERROR_SUCCESS)
{
RegCloseKey(hkeyShell);
return HRESULT_FROM_WIN32(ret);
}
}
else if (FAILED(hr))
{
RegCloseKey(hkeyShell);
return hr;
}
}
ret = RegOpenKeyExW(hkeyShell, pszExtra ? pszExtra : pszExtraFromReg, 0,
KEY_READ, &hkeyVerb);
HeapFree(GetProcessHeap(), 0, pszExtraFromReg);
RegCloseKey(hkeyShell);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
ret = RegOpenKeyExW(hkeyVerb, commandW, 0, KEY_READ, &hkeyCommand);
RegCloseKey(hkeyVerb);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
hr = ASSOC_GetValue(hkeyCommand, ppszCommand);
RegCloseKey(hkeyCommand);
return hr;
}
static HRESULT ASSOC_GetExecutable(IQueryAssociationsImpl *This,
LPCWSTR pszExtra, LPWSTR path,
DWORD pathlen, DWORD *len)
{
WCHAR *pszCommand;
WCHAR *pszStart;
WCHAR *pszEnd;
HRESULT hr;
assert(len);
hr = ASSOC_GetCommand(This, pszExtra, &pszCommand);
if (FAILED(hr))
return hr;
/* cleanup pszCommand */
if (pszCommand[0] == '"')
{
pszStart = pszCommand + 1;
pszEnd = strchrW(pszStart, '"');
if (pszEnd)
*pszEnd = 0;
*len = SearchPathW(NULL, pszStart, NULL, pathlen, path, NULL);
}
else
{
pszStart = pszCommand;
for (pszEnd = pszStart; (pszEnd = strchrW(pszEnd, ' ')); pszEnd++)
{
WCHAR c = *pszEnd;
*pszEnd = 0;
if ((*len = SearchPathW(NULL, pszStart, NULL, pathlen, path, NULL)))
break;
*pszEnd = c;
}
if (!pszEnd)
*len = SearchPathW(NULL, pszStart, NULL, pathlen, path, NULL);
}
HeapFree(GetProcessHeap(), 0, pszCommand);
if (!*len)
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
return S_OK;
}
static HRESULT ASSOC_ReturnData(LPWSTR out, DWORD *outlen, LPCWSTR data,
DWORD datalen)
{
assert(outlen);
if (out)
{
if (*outlen < datalen)
{
*outlen = datalen;
return E_POINTER;
}
*outlen = datalen;
lstrcpynW(out, data, datalen);
return S_OK;
}
else
{
*outlen = datalen;
return S_FALSE;
}
}
/**************************************************************************
* IQueryAssociations_GetString {SHLWAPI}
*
* Get a file association string from the registry.
*
* PARAMS
* iface [I] IQueryAssociations interface to query
* cfFlags [I] ASSOCF_ flags from "shlwapi.h"
* str [I] Type of string to get (ASSOCSTR enum from "shlwapi.h")
* pszExtra [I] Extra information about the string location
* pszOut [O] Destination for the association string
* pcchOut [I/O] Length of pszOut
*
* RETURNS
* Success: S_OK. pszOut contains the string, pcchOut contains its length.
* Failure: An HRESULT error code indicating the error.
*/
static HRESULT WINAPI IQueryAssociations_fnGetString(
IQueryAssociations *iface,
ASSOCF cfFlags,
ASSOCSTR str,
LPCWSTR pszExtra,
LPWSTR pszOut,
DWORD *pcchOut)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
const ASSOCF cfUnimplemented = ~(0);
DWORD len = 0;
HRESULT hr;
WCHAR path[MAX_PATH];
TRACE("(%p,0x%8x,0x%8x,%s,%p,%p)\n", This, cfFlags, str,
debugstr_w(pszExtra), pszOut, pcchOut);
if (cfFlags & cfUnimplemented)
FIXME("%08x: unimplemented flags!\n", cfFlags & cfUnimplemented);
if (!pcchOut)
return E_UNEXPECTED;
switch (str)
{
case ASSOCSTR_COMMAND:
{
WCHAR *command;
hr = ASSOC_GetCommand(This, pszExtra, &command);
if (SUCCEEDED(hr))
{
hr = ASSOC_ReturnData(pszOut, pcchOut, command, strlenW(command) + 1);
HeapFree(GetProcessHeap(), 0, command);
}
return hr;
}
case ASSOCSTR_EXECUTABLE:
{
hr = ASSOC_GetExecutable(This, pszExtra, path, MAX_PATH, &len);
if (FAILED(hr))
return hr;
len++;
return ASSOC_ReturnData(pszOut, pcchOut, path, len);
}
case ASSOCSTR_FRIENDLYDOCNAME:
{
WCHAR *pszFileType;
DWORD ret;
DWORD size;
hr = ASSOC_GetValue(This->hkeySource, &pszFileType);
if (FAILED(hr))
return hr;
size = 0;
ret = RegGetValueW(HKEY_CLASSES_ROOT, pszFileType, NULL, RRF_RT_REG_SZ, NULL, NULL, &size);
if (ret == ERROR_SUCCESS)
{
WCHAR *docName = HeapAlloc(GetProcessHeap(), 0, size);
if (docName)
{
ret = RegGetValueW(HKEY_CLASSES_ROOT, pszFileType, NULL, RRF_RT_REG_SZ, NULL, docName, &size);
if (ret == ERROR_SUCCESS)
hr = ASSOC_ReturnData(pszOut, pcchOut, docName, strlenW(docName) + 1);
else
hr = HRESULT_FROM_WIN32(ret);
HeapFree(GetProcessHeap(), 0, docName);
}
else
hr = E_OUTOFMEMORY;
}
else
hr = HRESULT_FROM_WIN32(ret);
HeapFree(GetProcessHeap(), 0, pszFileType);
return hr;
}
case ASSOCSTR_FRIENDLYAPPNAME:
{
PVOID verinfoW = NULL;
DWORD size, retval = 0;
UINT flen;
WCHAR *bufW;
static const WCHAR translationW[] = {
'\\','V','a','r','F','i','l','e','I','n','f','o',
'\\','T','r','a','n','s','l','a','t','i','o','n',0
};
static const WCHAR fileDescFmtW[] = {
'\\','S','t','r','i','n','g','F','i','l','e','I','n','f','o',
'\\','%','0','4','x','%','0','4','x',
'\\','F','i','l','e','D','e','s','c','r','i','p','t','i','o','n',0
};
WCHAR fileDescW[41];
hr = ASSOC_GetExecutable(This, pszExtra, path, MAX_PATH, &len);
if (FAILED(hr))
return hr;
retval = GetFileVersionInfoSizeW(path, &size);
if (!retval)
goto get_friendly_name_fail;
verinfoW = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, retval);
if (!verinfoW)
return E_OUTOFMEMORY;
if (!GetFileVersionInfoW(path, 0, retval, verinfoW))
goto get_friendly_name_fail;
if (VerQueryValueW(verinfoW, translationW, (LPVOID *)&bufW, &flen))
{
UINT i;
DWORD *langCodeDesc = (DWORD *)bufW;
for (i = 0; i < flen / sizeof(DWORD); i++)
{
sprintfW(fileDescW, fileDescFmtW, LOWORD(langCodeDesc[i]),
HIWORD(langCodeDesc[i]));
if (VerQueryValueW(verinfoW, fileDescW, (LPVOID *)&bufW, &flen))
{
/* Does strlenW(bufW) == 0 mean we use the filename? */
len = strlenW(bufW) + 1;
TRACE("found FileDescription: %s\n", debugstr_w(bufW));
hr = ASSOC_ReturnData(pszOut, pcchOut, bufW, len);
HeapFree(GetProcessHeap(), 0, verinfoW);
return hr;
}
}
}
get_friendly_name_fail:
PathRemoveExtensionW(path);
PathStripPathW(path);
TRACE("using filename: %s\n", debugstr_w(path));
hr = ASSOC_ReturnData(pszOut, pcchOut, path, strlenW(path) + 1);
HeapFree(GetProcessHeap(), 0, verinfoW);
return hr;
}
case ASSOCSTR_CONTENTTYPE:
{
static const WCHAR Content_TypeW[] = {'C','o','n','t','e','n','t',' ','T','y','p','e',0};
WCHAR *contentType;
DWORD ret;
DWORD size;
size = 0;
ret = RegGetValueW(This->hkeySource, NULL, Content_TypeW, RRF_RT_REG_SZ, NULL, NULL, &size);
if (ret != ERROR_SUCCESS)
return HRESULT_FROM_WIN32(ret);
contentType = HeapAlloc(GetProcessHeap(), 0, size);
if (contentType != NULL)
{
ret = RegGetValueW(This->hkeySource, NULL, Content_TypeW, RRF_RT_REG_SZ, NULL, contentType, &size);
if (ret == ERROR_SUCCESS)
hr = ASSOC_ReturnData(pszOut, pcchOut, contentType, strlenW(contentType) + 1);
else
hr = HRESULT_FROM_WIN32(ret);
HeapFree(GetProcessHeap(), 0, contentType);
}
else
hr = E_OUTOFMEMORY;
return hr;
}
case ASSOCSTR_DEFAULTICON:
{
static const WCHAR DefaultIconW[] = {'D','e','f','a','u','l','t','I','c','o','n',0};
WCHAR *pszFileType;
DWORD ret;
DWORD size;
HKEY hkeyFile;
hr = ASSOC_GetValue(This->hkeySource, &pszFileType);
if (FAILED(hr))
return hr;
ret = RegOpenKeyExW(HKEY_CLASSES_ROOT, pszFileType, 0, KEY_READ, &hkeyFile);
if (ret == ERROR_SUCCESS)
{
size = 0;
ret = RegGetValueW(hkeyFile, DefaultIconW, NULL, RRF_RT_REG_SZ, NULL, NULL, &size);
if (ret == ERROR_SUCCESS)
{
WCHAR *icon = HeapAlloc(GetProcessHeap(), 0, size);
if (icon)
{
ret = RegGetValueW(hkeyFile, DefaultIconW, NULL, RRF_RT_REG_SZ, NULL, icon, &size);
if (ret == ERROR_SUCCESS)
hr = ASSOC_ReturnData(pszOut, pcchOut, icon, strlenW(icon) + 1);
else
hr = HRESULT_FROM_WIN32(ret);
HeapFree(GetProcessHeap(), 0, icon);
}
else
hr = E_OUTOFMEMORY;
}
else
hr = HRESULT_FROM_WIN32(ret);
RegCloseKey(hkeyFile);
}
else
hr = HRESULT_FROM_WIN32(ret);
HeapFree(GetProcessHeap(), 0, pszFileType);
return hr;
}
default:
FIXME("assocstr %d unimplemented!\n", str);
return E_NOTIMPL;
}
}
/**************************************************************************
* IQueryAssociations_GetKey {SHLWAPI}
*
* Get a file association key from the registry.
*
* PARAMS
* iface [I] IQueryAssociations interface to query
* cfFlags [I] ASSOCF_ flags from "shlwapi.h"
* assockey [I] Type of key to get (ASSOCKEY enum from "shlwapi.h")
* pszExtra [I] Extra information about the key location
* phkeyOut [O] Destination for the association key
*
* RETURNS
* Success: S_OK. phkeyOut contains a handle to the key.
* Failure: An HRESULT error code indicating the error.
*/
static HRESULT WINAPI IQueryAssociations_fnGetKey(
IQueryAssociations *iface,
ASSOCF cfFlags,
ASSOCKEY assockey,
LPCWSTR pszExtra,
HKEY *phkeyOut)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
FIXME("(%p,0x%8x,0x%8x,%s,%p)-stub!\n", This, cfFlags, assockey,
debugstr_w(pszExtra), phkeyOut);
return E_NOTIMPL;
}
/**************************************************************************
* IQueryAssociations_GetData {SHLWAPI}
*
* Get the data for a file association key from the registry.
*
* PARAMS
* iface [I] IQueryAssociations interface to query
* cfFlags [I] ASSOCF_ flags from "shlwapi.h"
* assocdata [I] Type of data to get (ASSOCDATA enum from "shlwapi.h")
* pszExtra [I] Extra information about the data location
* pvOut [O] Destination for the association key
* pcbOut [I/O] Size of pvOut
*
* RETURNS
* Success: S_OK. pszOut contains the data, pcbOut contains its length.
* Failure: An HRESULT error code indicating the error.
*/
static HRESULT WINAPI IQueryAssociations_fnGetData(
IQueryAssociations *iface,
ASSOCF cfFlags,
ASSOCDATA assocdata,
LPCWSTR pszExtra,
LPVOID pvOut,
DWORD *pcbOut)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
FIXME("(%p,0x%8x,0x%8x,%s,%p,%p)-stub!\n", This, cfFlags, assocdata,
debugstr_w(pszExtra), pvOut, pcbOut);
return E_NOTIMPL;
}
/**************************************************************************
* IQueryAssociations_GetEnum {SHLWAPI}
*
* Not yet implemented in native Win32.
*
* PARAMS
* iface [I] IQueryAssociations interface to query
* cfFlags [I] ASSOCF_ flags from "shlwapi.h"
* assocenum [I] Type of enum to get (ASSOCENUM enum from "shlwapi.h")
* pszExtra [I] Extra information about the enum location
* riid [I] REFIID to look for
* ppvOut [O] Destination for the interface.
*
* RETURNS
* Success: S_OK.
* Failure: An HRESULT error code indicating the error.
*
* NOTES
* Presumably this function returns an enumerator object.
*/
static HRESULT WINAPI IQueryAssociations_fnGetEnum(
IQueryAssociations *iface,
ASSOCF cfFlags,
ASSOCENUM assocenum,
LPCWSTR pszExtra,
REFIID riid,
LPVOID *ppvOut)
{
IQueryAssociationsImpl *This = impl_from_IQueryAssociations(iface);
FIXME("(%p,0x%8x,0x%8x,%s,%s,%p)-stub!\n", This, cfFlags, assocenum,
debugstr_w(pszExtra), debugstr_guid(riid), ppvOut);
return E_NOTIMPL;
}
static const IQueryAssociationsVtbl IQueryAssociations_vtbl =
{
IQueryAssociations_fnQueryInterface,
IQueryAssociations_fnAddRef,
IQueryAssociations_fnRelease,
IQueryAssociations_fnInit,
IQueryAssociations_fnGetString,
IQueryAssociations_fnGetKey,
IQueryAssociations_fnGetData,
IQueryAssociations_fnGetEnum
};
/**************************************************************************
* IQueryAssociations_Constructor [internal]
*
* Construct a new IQueryAssociations object.
*/
HRESULT WINAPI QueryAssociations_Constructor(IUnknown *pUnkOuter, REFIID riid, LPVOID *ppOutput)
{
IQueryAssociationsImpl* this;
HRESULT ret;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
if (!(this = SHAlloc(sizeof(*this)))) return E_OUTOFMEMORY;
this->IQueryAssociations_iface.lpVtbl = &IQueryAssociations_vtbl;
this->ref = 0;
this->hkeySource = 0;
this->hkeyProgID = 0;
if (FAILED(ret = IUnknown_QueryInterface((IUnknown *)this, riid, ppOutput))) SHFree( this );
TRACE("returning %p\n", *ppOutput);
return ret;
}
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