dlls/shlwapi/assoc.c

   1 /*
   2  * IQueryAssociations object and helper functions
   3  *
   4  * Copyright 2002 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20 #include <stdarg.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winnls.h"
  25 #include "winreg.h"
  26 #include "objbase.h"
  27 #include "shlguid.h"
  28 #include "shlwapi.h"
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(shell);
  32
  33 /**************************************************************************
  34  *  IQueryAssociations {SHLWAPI}
  35  *
  36  * DESCRIPTION
  37  *  This object provides a layer of abstraction over the system registry in
  38  *  order to simplify the process of parsing associations between files.
  39  *  Associations in this context means the registry entries that link (for
  40  *  example) the extension of a file with its description, list of
  41  *  applications to open the file with, and actions that can be performed on it
  42  *  (the shell displays such information in the context menu of explorer
  43  *  when you right-click on a file).
  44  *
  45  * HELPERS
  46  * You can use this object transparently by calling the helper functions
  47  * AssocQueryKeyA(), AssocQueryStringA() and AssocQueryStringByKeyA(). These
  48  * create an IQueryAssociations object, perform the requested actions
  49  * and then dispose of the object. Alternatively, you can create an instance
  50  * of the object using AssocCreate() and call the following methods on it:
  51  *
  52  * METHODS
  53  */
  54
  55 /* Default IQueryAssociations::Init() flags */
  56 #define SHLWAPI_DEF_ASSOCF (ASSOCF_INIT_BYEXENAME|ASSOCF_INIT_DEFAULTTOSTAR| \
  57                             ASSOCF_INIT_DEFAULTTOFOLDER)
  58
  59 typedef struct
  60 {
  61   const IQueryAssociationsVtbl *lpVtbl;
  62   LONG ref;
  63   HKEY hkeySource;
  64   HKEY hkeyProgID;
  65 } IQueryAssociationsImpl;
  66
  67 static const IQueryAssociationsVtbl IQueryAssociations_vtbl;
  68
  69 /**************************************************************************
  70  *  IQueryAssociations_Constructor [internal]
  71  *
  72  * Construct a new IQueryAssociations object.
  73  */
  74 static IQueryAssociations* IQueryAssociations_Constructor(void)
  75 {
  76   IQueryAssociationsImpl* iface;
  77
  78   iface = HeapAlloc(GetProcessHeap(),0,sizeof(IQueryAssociationsImpl));
  79   iface->lpVtbl = &IQueryAssociations_vtbl;
  80   iface->ref = 1;
  81   iface->hkeySource = NULL;
  82   iface->hkeyProgID = NULL;
  83
  84   TRACE("Returning IQueryAssociations* %p\n", iface);
  85   return (IQueryAssociations*)iface;
  86 }
  87
  88 /*************************************************************************
  89  * SHLWAPI_ParamAToW
  90  *
  91  * Internal helper function: Convert ASCII parameter to Unicode.
  92  */
  93 static BOOL SHLWAPI_ParamAToW(LPCSTR lpszParam, LPWSTR lpszBuff, DWORD dwLen,
  94                               LPWSTR* lpszOut)
  95 {
  96   if (lpszParam)
  97   {
  98     DWORD dwStrLen = MultiByteToWideChar(CP_ACP, 0, lpszParam, -1, NULL, 0);
  99
 100     if (dwStrLen < dwLen)
 101     {
 102       *lpszOut = lpszBuff; /* Use Buffer, it is big enough */
 103     }
 104     else
 105     {
 106       /* Create a new buffer big enough for the string */
 107       *lpszOut = HeapAlloc(GetProcessHeap(), 0,
 108                                    dwStrLen * sizeof(WCHAR));
 109       if (!*lpszOut)
 110         return FALSE;
 111     }
 112     MultiByteToWideChar(CP_ACP, 0, lpszParam, -1, *lpszOut, dwStrLen);
 113   }
 114   else
 115     *lpszOut = NULL;
 116   return TRUE;
 117 }
 118
 119 /*************************************************************************
 120  * AssocCreate  [SHLWAPI.@]
 121  *
 122  * Create a new IQueryAssociations object.
 123  *
 124  * PARAMS
 125  *  clsid       [I] CLSID of object
 126  *  refiid      [I] REFIID of interface
 127  *  lpInterface [O] Destination for the created IQueryAssociations object
 128  *
 129  * RETURNS
 130  *  Success: S_OK. lpInterface contains the new object.
 131  *  Failure: An HRESULT error code indicating the error.
 132  *
 133  * NOTES
 134  *  refiid must be equal to IID_IQueryAssociations, or this function will fail.
 135  */
 136 HRESULT WINAPI AssocCreate(CLSID clsid, REFIID refiid, void **lpInterface)
 137 {
 138   HRESULT hRet;
 139   IQueryAssociations* lpAssoc;
 140
 141   TRACE("(%s,%s,%p)\n", debugstr_guid(&clsid), debugstr_guid(refiid),
 142         lpInterface);
 143
 144   if (!lpInterface)
 145     return E_INVALIDARG;
 146
 147   *(DWORD*)lpInterface = 0;
 148
 149   if (!IsEqualGUID(&clsid, &IID_IQueryAssociations))
 150     return E_NOTIMPL;
 151
 152   lpAssoc = IQueryAssociations_Constructor();
 153
 154   if (!lpAssoc)
 155     return E_OUTOFMEMORY;
 156
 157   hRet = IQueryAssociations_QueryInterface(lpAssoc, refiid, lpInterface);
 158   IQueryAssociations_Release(lpAssoc);
 159   return hRet;
 160 }
 161
 162 /*************************************************************************
 163  * AssocQueryKeyW  [SHLWAPI.@]
 164  *
 165  * See AssocQueryKeyA.
 166  */
 167 HRESULT WINAPI AssocQueryKeyW(ASSOCF cfFlags, ASSOCKEY assockey, LPCWSTR pszAssoc,
 168                               LPCWSTR pszExtra, HKEY *phkeyOut)
 169 {
 170   HRESULT hRet;
 171   IQueryAssociations* lpAssoc;
 172
 173   TRACE("(0x%8x,0x%8x,%s,%s,%p)\n", cfFlags, assockey, debugstr_w(pszAssoc),
 174         debugstr_w(pszExtra), phkeyOut);
 175
 176   lpAssoc = IQueryAssociations_Constructor();
 177
 178   if (!lpAssoc)
 179     return E_OUTOFMEMORY;
 180
 181   cfFlags &= SHLWAPI_DEF_ASSOCF;
 182   hRet = IQueryAssociations_Init(lpAssoc, cfFlags, pszAssoc, NULL, NULL);
 183
 184   if (SUCCEEDED(hRet))
 185     hRet = IQueryAssociations_GetKey(lpAssoc, cfFlags, assockey, pszExtra, phkeyOut);
 186
 187   IQueryAssociations_Release(lpAssoc);
 188   return hRet;
 189 }
 190
 191 /*************************************************************************
 192  * AssocQueryKeyA  [SHLWAPI.@]
 193  *
 194  * Get a file association key from the registry.
 195  *
 196  * PARAMS
 197  *  cfFlags  [I] ASSOCF_ flags from "shlwapi.h"
 198  *  assockey [I] Type of key to get
 199  *  pszAssoc [I] Key name to search below
 200  *  pszExtra [I] Extra information about the key location
 201  *  phkeyOut [O] Destination for the association key
 202  *
 203  * RETURNS
 204  *  Success: S_OK. phkeyOut contains the key.
 205  *  Failure: An HRESULT error code indicating the error.
 206  */
 207 HRESULT WINAPI AssocQueryKeyA(ASSOCF cfFlags, ASSOCKEY assockey, LPCSTR pszAssoc,
 208                               LPCSTR pszExtra, HKEY *phkeyOut)
 209 {
 210   WCHAR szAssocW[MAX_PATH], *lpszAssocW = NULL;
 211   WCHAR szExtraW[MAX_PATH], *lpszExtraW = NULL;
 212   HRESULT hRet = E_OUTOFMEMORY;
 213
 214   TRACE("(0x%8x,0x%8x,%s,%s,%p)\n", cfFlags, assockey, debugstr_a(pszAssoc),
 215         debugstr_a(pszExtra), phkeyOut);
 216
 217   if (SHLWAPI_ParamAToW(pszAssoc, szAssocW, MAX_PATH, &lpszAssocW) &&
 218       SHLWAPI_ParamAToW(pszExtra, szExtraW, MAX_PATH, &lpszExtraW))
 219   {
 220     hRet = AssocQueryKeyW(cfFlags, assockey, lpszAssocW, lpszExtraW, phkeyOut);
 221   }
 222
 223   if (lpszAssocW != szAssocW)
 224     HeapFree(GetProcessHeap(), 0, lpszAssocW);
 225
 226   if (lpszExtraW != szExtraW)
 227     HeapFree(GetProcessHeap(), 0, lpszExtraW);
 228
 229   return hRet;
 230 }
 231
 232 /*************************************************************************
 233  * AssocQueryStringW  [SHLWAPI.@]
 234  *
 235  * See AssocQueryStringA.
 236  */
 237 HRESULT WINAPI AssocQueryStringW(ASSOCF cfFlags, ASSOCSTR str, LPCWSTR pszAssoc,
 238                                  LPCWSTR pszExtra, LPWSTR pszOut, DWORD *pcchOut)
 239 {
 240   HRESULT hRet;
 241   IQueryAssociations* lpAssoc;
 242
 243   TRACE("(0x%8x,0x%8x,%s,%s,%p,%p)\n", cfFlags, str, debugstr_w(pszAssoc),
 244         debugstr_w(pszExtra), pszOut, pcchOut);
 245
 246   if (!pcchOut)
 247     return E_INVALIDARG;
 248
 249   lpAssoc = IQueryAssociations_Constructor();
 250
 251   if (!lpAssoc)
 252     return E_OUTOFMEMORY;
 253
 254   hRet = IQueryAssociations_Init(lpAssoc, cfFlags & SHLWAPI_DEF_ASSOCF,
 255                                  pszAssoc, NULL, NULL);
 256
 257   if (SUCCEEDED(hRet))
 258     hRet = IQueryAssociations_GetString(lpAssoc, cfFlags, str, pszExtra,
 259                                         pszOut, pcchOut);
 260
 261   IQueryAssociations_Release(lpAssoc);
 262   return hRet;
 263 }
 264
 265 /*************************************************************************
 266  * AssocQueryStringA  [SHLWAPI.@]
 267  *
 268  * Get a file association string from the registry.
 269  *
 270  * PARAMS
 271  *  cfFlags  [I] ASSOCF_ flags from "shlwapi.h"
 272  *  str      [I] Type of string to get (ASSOCSTR enum from "shlwapi.h")
 273  *  pszAssoc [I] Key name to search below
 274  *  pszExtra [I] Extra information about the string location
 275  *  pszOut   [O] Destination for the association string
 276  *  pcchOut  [O] Length of pszOut
 277  *
 278  * RETURNS
 279  *  Success: S_OK. pszOut contains the string, pcchOut contains its length.
 280  *  Failure: An HRESULT error code indicating the error.
 281  */
 282 HRESULT WINAPI AssocQueryStringA(ASSOCF cfFlags, ASSOCSTR str, LPCSTR pszAssoc,
 283                                  LPCSTR pszExtra, LPSTR pszOut, DWORD *pcchOut)
 284 {
 285   WCHAR szAssocW[MAX_PATH], *lpszAssocW = NULL;
 286   WCHAR szExtraW[MAX_PATH], *lpszExtraW = NULL;
 287   HRESULT hRet = E_OUTOFMEMORY;
 288
 289   TRACE("(0x%8x,0x%8x,%s,%s,%p,%p)\n", cfFlags, str, debugstr_a(pszAssoc),
 290         debugstr_a(pszExtra), pszOut, pcchOut);
 291
 292   if (!pcchOut)
 293     hRet = E_INVALIDARG;
 294   else if (SHLWAPI_ParamAToW(pszAssoc, szAssocW, MAX_PATH, &lpszAssocW) &&
 295            SHLWAPI_ParamAToW(pszExtra, szExtraW, MAX_PATH, &lpszExtraW))
 296   {
 297     WCHAR szReturnW[MAX_PATH], *lpszReturnW = szReturnW;
 298     DWORD dwLenOut = *pcchOut;
 299
 300     if (dwLenOut >= MAX_PATH)
 301       lpszReturnW = HeapAlloc(GetProcessHeap(), 0,
 302                                       (dwLenOut + 1) * sizeof(WCHAR));
 303
 304     if (!lpszReturnW)
 305       hRet = E_OUTOFMEMORY;
 306     else
 307     {
 308       hRet = AssocQueryStringW(cfFlags, str, lpszAssocW, lpszExtraW,
 309                                lpszReturnW, &dwLenOut);
 310
 311       if (SUCCEEDED(hRet))
 312         WideCharToMultiByte(CP_ACP,0,szReturnW,-1,pszOut,dwLenOut,0,0);
 313       *pcchOut = dwLenOut;
 314
 315       if (lpszReturnW != szReturnW)
 316         HeapFree(GetProcessHeap(), 0, lpszReturnW);
 317     }
 318   }
 319
 320   if (lpszAssocW != szAssocW)
 321     HeapFree(GetProcessHeap(), 0, lpszAssocW);
 322   if (lpszExtraW != szExtraW)
 323     HeapFree(GetProcessHeap(), 0, lpszExtraW);
 324   return hRet;
 325 }
 326
 327 /*************************************************************************
 328  * AssocQueryStringByKeyW  [SHLWAPI.@]
 329  *
 330  * See AssocQueryStringByKeyA.
 331  */
 332 HRESULT WINAPI AssocQueryStringByKeyW(ASSOCF cfFlags, ASSOCSTR str, HKEY hkAssoc,
 333                                       LPCWSTR pszExtra, LPWSTR pszOut,
 334                                       DWORD *pcchOut)
 335 {
 336   HRESULT hRet;
 337   IQueryAssociations* lpAssoc;
 338
 339   TRACE("(0x%8x,0x%8x,%p,%s,%p,%p)\n", cfFlags, str, hkAssoc,
 340         debugstr_w(pszExtra), pszOut, pcchOut);
 341
 342   lpAssoc = IQueryAssociations_Constructor();
 343
 344   if (!lpAssoc)
 345     return E_OUTOFMEMORY;
 346
 347   cfFlags &= SHLWAPI_DEF_ASSOCF;
 348   hRet = IQueryAssociations_Init(lpAssoc, cfFlags, 0, hkAssoc, NULL);
 349
 350   if (SUCCEEDED(hRet))
 351     hRet = IQueryAssociations_GetString(lpAssoc, cfFlags, str, pszExtra,
 352                                         pszOut, pcchOut);
 353
 354   IQueryAssociations_Release(lpAssoc);
 355   return hRet;
 356 }
 357
 358 /*************************************************************************
 359  * AssocQueryStringByKeyA  [SHLWAPI.@]
 360  *
 361  * Get a file association string from the registry, given a starting key.
 362  *
 363  * PARAMS
 364  *  cfFlags  [I] ASSOCF_ flags from "shlwapi.h"
 365  *  str      [I] Type of string to get
 366  *  hkAssoc  [I] Key to search below
 367  *  pszExtra [I] Extra information about the string location
 368  *  pszOut   [O] Destination for the association string
 369  *  pcchOut  [O] Length of pszOut
 370  *
 371  * RETURNS
 372  *  Success: S_OK. pszOut contains the string, pcchOut contains its length.
 373  *  Failure: An HRESULT error code indicating the error.
 374  */
 375 HRESULT WINAPI AssocQueryStringByKeyA(ASSOCF cfFlags, ASSOCSTR str, HKEY hkAssoc,
 376                                       LPCSTR pszExtra, LPSTR pszOut,
 377                                       DWORD *pcchOut)
 378 {
 379   WCHAR szExtraW[MAX_PATH], *lpszExtraW = szExtraW;
 380   WCHAR szReturnW[MAX_PATH], *lpszReturnW = szReturnW;
 381   HRESULT hRet = E_OUTOFMEMORY;
 382
 383   TRACE("(0x%8x,0x%8x,%p,%s,%p,%p)\n", cfFlags, str, hkAssoc,
 384         debugstr_a(pszExtra), pszOut, pcchOut);
 385
 386   if (!pcchOut)
 387     hRet = E_INVALIDARG;
 388   else if (SHLWAPI_ParamAToW(pszExtra, szExtraW, MAX_PATH, &lpszExtraW))
 389   {
 390     DWORD dwLenOut = *pcchOut;
 391     if (dwLenOut >= MAX_PATH)
 392       lpszReturnW = HeapAlloc(GetProcessHeap(), 0,
 393                                       (dwLenOut + 1) * sizeof(WCHAR));
 394
 395     if (lpszReturnW)
 396     {
 397       hRet = AssocQueryStringByKeyW(cfFlags, str, hkAssoc, lpszExtraW,
 398                                     lpszReturnW, &dwLenOut);
 399
 400       if (SUCCEEDED(hRet))
 401         WideCharToMultiByte(CP_ACP,0,szReturnW,-1,pszOut,dwLenOut,0,0);
 402       *pcchOut = dwLenOut;
 403
 404       if (lpszReturnW != szReturnW)
 405         HeapFree(GetProcessHeap(), 0, lpszReturnW);
 406     }
 407   }
 408
 409   if (lpszExtraW != szExtraW)
 410     HeapFree(GetProcessHeap(), 0, lpszExtraW);
 411   return hRet;
 412 }
 413
 414
 415 /**************************************************************************
 416  *  AssocIsDangerous  (SHLWAPI.@)
 417  *
 418  * Determine if a file association is dangerous (potentially malware).
 419  *
 420  * PARAMS
 421  *  lpszAssoc [I] Name of file or file extension to check.
 422  *
 423  * RETURNS
 424  *  TRUE, if lpszAssoc may potentially be malware (executable),
 425  *  FALSE, Otherwise.
 426  */
 427 BOOL WINAPI AssocIsDangerous(LPCWSTR lpszAssoc)
 428 {
 429     FIXME("%s\n", debugstr_w(lpszAssoc));
 430     return FALSE;
 431 }
 432
 433 /**************************************************************************
 434  *  IQueryAssociations_QueryInterface {SHLWAPI}
 435  *
 436  * See IUnknown_QueryInterface.
 437  */
 438 static HRESULT WINAPI IQueryAssociations_fnQueryInterface(
 439   IQueryAssociations* iface,
 440   REFIID riid,
 441   LPVOID *ppvObj)
 442 {
 443   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 444
 445   TRACE("(%p,%s,%p)\n",This, debugstr_guid(riid), ppvObj);
 446
 447   *ppvObj = NULL;
 448
 449   if (IsEqualIID(riid, &IID_IUnknown) ||
 450       IsEqualIID(riid, &IID_IQueryAssociations))
 451   {
 452     *ppvObj = (IQueryAssociations*)This;
 453
 454     IQueryAssociations_AddRef((IQueryAssociations*)*ppvObj);
 455     TRACE("Returning IQueryAssociations (%p)\n", *ppvObj);
 456     return S_OK;
 457   }
 458   TRACE("Returning E_NOINTERFACE\n");
 459   return E_NOINTERFACE;
 460 }
 461
 462 /**************************************************************************
 463  *  IQueryAssociations_AddRef {SHLWAPI}
 464  *
 465  * See IUnknown_AddRef.
 466  */
 467 static ULONG WINAPI IQueryAssociations_fnAddRef(IQueryAssociations *iface)
 468 {
 469   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 470   ULONG refCount = InterlockedIncrement(&This->ref);
 471
 472   TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
 473
 474   return refCount;
 475 }
 476
 477 /**************************************************************************
 478  *  IQueryAssociations_Release {SHLWAPI}
 479  *
 480  * See IUnknown_Release.
 481  */
 482 static ULONG WINAPI IQueryAssociations_fnRelease(IQueryAssociations *iface)
 483 {
 484   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 485   ULONG refCount = InterlockedDecrement(&This->ref);
 486
 487   TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
 488
 489   if (!refCount)
 490   {
 491     TRACE("Destroying IQueryAssociations (%p)\n", This);
 492     HeapFree(GetProcessHeap(), 0, This);
 493   }
 494
 495   return refCount;
 496 }
 497
 498 /**************************************************************************
 499  *  IQueryAssociations_Init {SHLWAPI}
 500  *
 501  * Initialise an IQueryAssociations object.
 502  *
 503  * PARAMS
 504  *  iface      [I] IQueryAssociations interface to initialise
 505  *  cfFlags    [I] ASSOCF_ flags from "shlwapi.h"
 506  *  pszAssoc   [I] String for the root key name, or NULL if hkProgid is given
 507  *  hkeyProgid [I] Handle for the root key, or NULL if pszAssoc is given
 508  *  hWnd       [I] Reserved, must be NULL.
 509  *
 510  * RETURNS
 511  *  Success: S_OK. iface is initialised with the parameters given.
 512  *  Failure: An HRESULT error code indicating the error.
 513  */
 514 static HRESULT WINAPI IQueryAssociations_fnInit(
 515   IQueryAssociations *iface,
 516   ASSOCF cfFlags,
 517   LPCWSTR pszAssoc,
 518   HKEY hkeyProgid,
 519   HWND hWnd)
 520 {
 521     static const WCHAR szProgID[] = {'P','r','o','g','I','D',0};
 522     IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 523     HRESULT hr;
 524
 525     TRACE("(%p)->(%d,%s,%p,%p)\n", iface,
 526                                     cfFlags,
 527                                     debugstr_w(pszAssoc),
 528                                     hkeyProgid,
 529                                     hWnd);
 530     if (hWnd != NULL)
 531         FIXME("hwnd != NULL not supported\n");
 532     if (cfFlags != 0)
 533         FIXME("unsupported flags: %x\n", cfFlags);
 534     if (pszAssoc != NULL)
 535     {
 536         hr = RegOpenKeyExW(HKEY_CLASSES_ROOT,
 537                            pszAssoc,
 538                            0,
 539                            KEY_READ,
 540                            &This->hkeySource);
 541         if (FAILED(hr))
 542             return HRESULT_FROM_WIN32(ERROR_NO_ASSOCIATION);
 543         /* if this is not a prog id */
 544         if ((*pszAssoc == '.') || (*pszAssoc == '{'))
 545         {
 546             hr = RegOpenKeyExW(This->hkeySource,
 547                                szProgID,
 548                                0,
 549                                KEY_READ,
 550                                &This->hkeyProgID);
 551             if (FAILED(hr))
 552                 FIXME("Don't know what to return\n");
 553         }
 554         else
 555             This->hkeyProgID = This->hkeySource;
 556         return S_OK;
 557     }
 558     else if (hkeyProgid != NULL)
 559     {
 560         This->hkeyProgID = hkeyProgid;
 561         return S_OK;
 562     }
 563     else
 564         return E_FAIL;
 565 }
 566
 567 /**************************************************************************
 568  *  IQueryAssociations_GetString {SHLWAPI}
 569  *
 570  * Get a file association string from the registry.
 571  *
 572  * PARAMS
 573  *  iface    [I]   IQueryAssociations interface to query
 574  *  cfFlags  [I]   ASSOCF_ flags from "shlwapi.h"
 575  *  str      [I]   Type of string to get (ASSOCSTR enum from "shlwapi.h")
 576  *  pszExtra [I]   Extra information about the string location
 577  *  pszOut   [O]   Destination for the association string
 578  *  pcchOut  [I/O] Length of pszOut
 579  *
 580  * RETURNS
 581  *  Success: S_OK. pszOut contains the string, pcchOut contains its length.
 582  *  Failure: An HRESULT error code indicating the error.
 583  */
 584 static HRESULT WINAPI IQueryAssociations_fnGetString(
 585   IQueryAssociations *iface,
 586   ASSOCF cfFlags,
 587   ASSOCSTR str,
 588   LPCWSTR pszExtra,
 589   LPWSTR pszOut,
 590   DWORD *pcchOut)
 591 {
 592   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 593
 594   FIXME("(%p,0x%8x,0x%8x,%s,%p,%p)-stub!\n", This, cfFlags, str,
 595         debugstr_w(pszExtra), pszOut, pcchOut);
 596   return E_NOTIMPL;
 597 }
 598
 599 /**************************************************************************
 600  *  IQueryAssociations_GetKey {SHLWAPI}
 601  *
 602  * Get a file association key from the registry.
 603  *
 604  * PARAMS
 605  *  iface    [I] IQueryAssociations interface to query
 606  *  cfFlags  [I] ASSOCF_ flags from "shlwapi.h"
 607  *  assockey [I] Type of key to get (ASSOCKEY enum from "shlwapi.h")
 608  *  pszExtra [I] Extra information about the key location
 609  *  phkeyOut [O] Destination for the association key
 610  *
 611  * RETURNS
 612  *  Success: S_OK. phkeyOut contains a handle to the key.
 613  *  Failure: An HRESULT error code indicating the error.
 614  */
 615 static HRESULT WINAPI IQueryAssociations_fnGetKey(
 616   IQueryAssociations *iface,
 617   ASSOCF cfFlags,
 618   ASSOCKEY assockey,
 619   LPCWSTR pszExtra,
 620   HKEY *phkeyOut)
 621 {
 622   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 623
 624   FIXME("(%p,0x%8x,0x%8x,%s,%p)-stub!\n", This, cfFlags, assockey,
 625         debugstr_w(pszExtra), phkeyOut);
 626   return E_NOTIMPL;
 627 }
 628
 629 /**************************************************************************
 630  *  IQueryAssociations_GetData {SHLWAPI}
 631  *
 632  * Get the data for a file association key from the registry.
 633  *
 634  * PARAMS
 635  *  iface     [I]   IQueryAssociations interface to query
 636  *  cfFlags   [I]   ASSOCF_ flags from "shlwapi.h"
 637  *  assocdata [I]   Type of data to get (ASSOCDATA enum from "shlwapi.h")
 638  *  pszExtra  [I]   Extra information about the data location
 639  *  pvOut     [O]   Destination for the association key
 640  *  pcbOut    [I/O] Size of pvOut
 641  *
 642  * RETURNS
 643  *  Success: S_OK. pszOut contains the data, pcbOut contains its length.
 644  *  Failure: An HRESULT error code indicating the error.
 645  */
 646 static HRESULT WINAPI IQueryAssociations_fnGetData(
 647   IQueryAssociations *iface,
 648   ASSOCF cfFlags,
 649   ASSOCDATA assocdata,
 650   LPCWSTR pszExtra,
 651   LPVOID pvOut,
 652   DWORD *pcbOut)
 653 {
 654   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 655
 656   FIXME("(%p,0x%8x,0x%8x,%s,%p,%p)-stub!\n", This, cfFlags, assocdata,
 657         debugstr_w(pszExtra), pvOut, pcbOut);
 658   return E_NOTIMPL;
 659 }
 660
 661 /**************************************************************************
 662  *  IQueryAssociations_GetEnum {SHLWAPI}
 663  *
 664  * Not yet implemented in native Win32.
 665  *
 666  * PARAMS
 667  *  iface     [I] IQueryAssociations interface to query
 668  *  cfFlags   [I] ASSOCF_ flags from "shlwapi.h"
 669  *  assocenum [I] Type of enum to get (ASSOCENUM enum from "shlwapi.h")
 670  *  pszExtra  [I] Extra information about the enum location
 671  *  riid      [I] REFIID to look for
 672  *  ppvOut    [O] Destination for the interface.
 673  *
 674  * RETURNS
 675  *  Success: S_OK.
 676  *  Failure: An HRESULT error code indicating the error.
 677  *
 678  * NOTES
 679  *  Presumably this function returns an enumerator object.
 680  */
 681 static HRESULT WINAPI IQueryAssociations_fnGetEnum(
 682   IQueryAssociations *iface,
 683   ASSOCF cfFlags,
 684   ASSOCENUM assocenum,
 685   LPCWSTR pszExtra,
 686   REFIID riid,
 687   LPVOID *ppvOut)
 688 {
 689   IQueryAssociationsImpl *This = (IQueryAssociationsImpl *)iface;
 690
 691   FIXME("(%p,0x%8x,0x%8x,%s,%s,%p)-stub!\n", This, cfFlags, assocenum,
 692         debugstr_w(pszExtra), debugstr_guid(riid), ppvOut);
 693   return E_NOTIMPL;
 694 }
 695
 696 static const IQueryAssociationsVtbl IQueryAssociations_vtbl =
 697 {
 698   IQueryAssociations_fnQueryInterface,
 699   IQueryAssociations_fnAddRef,
 700   IQueryAssociations_fnRelease,
 701   IQueryAssociations_fnInit,
 702   IQueryAssociations_fnGetString,
 703   IQueryAssociations_fnGetKey,
 704   IQueryAssociations_fnGetData,
 705   IQueryAssociations_fnGetEnum
 706 };