dll/win32/oleacc/client.c

   1 /*
   2  * Copyright 2014 Piotr Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define COBJMACROS
  20
  21 #include "oleacc_private.h"
  22
  23 #include "wine/unicode.h"
  24 #include "wine/debug.h"
  25 #include "wine/heap.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(oleacc);
  28
  29 typedef struct {
  30     IAccessible IAccessible_iface;
  31     IOleWindow IOleWindow_iface;
  32     IEnumVARIANT IEnumVARIANT_iface;
  33
  34     LONG ref;
  35
  36     HWND hwnd;
  37     HWND enum_pos;
  38 } Client;
  39
  40 static inline Client* impl_from_Client(IAccessible *iface)
  41 {
  42     return CONTAINING_RECORD(iface, Client, IAccessible_iface);
  43 }
  44
  45 static HRESULT WINAPI Client_QueryInterface(IAccessible *iface, REFIID riid, void **ppv)
  46 {
  47     Client *This = impl_from_Client(iface);
  48
  49     TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
  50
  51     if(IsEqualIID(riid, &IID_IAccessible) ||
  52             IsEqualIID(riid, &IID_IDispatch) ||
  53             IsEqualIID(riid, &IID_IUnknown)) {
  54         *ppv = iface;
  55     }else if(IsEqualIID(riid, &IID_IOleWindow)) {
  56         *ppv = &This->IOleWindow_iface;
  57     }else if(IsEqualIID(riid, &IID_IEnumVARIANT)) {
  58         *ppv = &This->IEnumVARIANT_iface;
  59     }else {
  60         WARN("no interface: %s\n", debugstr_guid(riid));
  61         *ppv = NULL;
  62         return E_NOINTERFACE;
  63     }
  64
  65     IAccessible_AddRef(iface);
  66     return S_OK;
  67 }
  68
  69 static ULONG WINAPI Client_AddRef(IAccessible *iface)
  70 {
  71     Client *This = impl_from_Client(iface);
  72     ULONG ref = InterlockedIncrement(&This->ref);
  73
  74     TRACE("(%p) ref = %u\n", This, ref);
  75     return ref;
  76 }
  77
  78 static ULONG WINAPI Client_Release(IAccessible *iface)
  79 {
  80     Client *This = impl_from_Client(iface);
  81     ULONG ref = InterlockedDecrement(&This->ref);
  82
  83     TRACE("(%p) ref = %u\n", This, ref);
  84
  85     if(!ref)
  86         heap_free(This);
  87     return ref;
  88 }
  89
  90 static HRESULT WINAPI Client_GetTypeInfoCount(IAccessible *iface, UINT *pctinfo)
  91 {
  92     Client *This = impl_from_Client(iface);
  93     FIXME("(%p)->(%p)\n", This, pctinfo);
  94     return E_NOTIMPL;
  95 }
  96
  97 static HRESULT WINAPI Client_GetTypeInfo(IAccessible *iface,
  98         UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo)
  99 {
 100     Client *This = impl_from_Client(iface);
 101     FIXME("(%p)->(%u %x %p)\n", This, iTInfo, lcid, ppTInfo);
 102     return E_NOTIMPL;
 103 }
 104
 105 static HRESULT WINAPI Client_GetIDsOfNames(IAccessible *iface, REFIID riid,
 106         LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId)
 107 {
 108     Client *This = impl_from_Client(iface);
 109     FIXME("(%p)->(%s %p %u %x %p)\n", This, debugstr_guid(riid),
 110             rgszNames, cNames, lcid, rgDispId);
 111     return E_NOTIMPL;
 112 }
 113
 114 static HRESULT WINAPI Client_Invoke(IAccessible *iface, DISPID dispIdMember,
 115         REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams,
 116         VARIANT *pVarResult, EXCEPINFO *pExcepInfo, UINT *puArgErr)
 117 {
 118     Client *This = impl_from_Client(iface);
 119     FIXME("(%p)->(%x %s %x %x %p %p %p %p)\n", This, dispIdMember, debugstr_guid(riid),
 120             lcid, wFlags, pDispParams, pVarResult, pExcepInfo, puArgErr);
 121     return E_NOTIMPL;
 122 }
 123
 124 static HRESULT WINAPI Client_get_accParent(IAccessible *iface, IDispatch **ppdispParent)
 125 {
 126     Client *This = impl_from_Client(iface);
 127
 128     TRACE("(%p)->(%p)\n", This, ppdispParent);
 129
 130     return AccessibleObjectFromWindow(This->hwnd, OBJID_WINDOW,
 131             &IID_IDispatch, (void**)ppdispParent);
 132 }
 133
 134 static HRESULT WINAPI Client_get_accChildCount(IAccessible *iface, LONG *pcountChildren)
 135 {
 136     Client *This = impl_from_Client(iface);
 137     HWND cur;
 138
 139     TRACE("(%p)->(%p)\n", This, pcountChildren);
 140
 141     *pcountChildren = 0;
 142     for(cur = GetWindow(This->hwnd, GW_CHILD); cur; cur = GetWindow(cur, GW_HWNDNEXT))
 143         (*pcountChildren)++;
 144
 145     return S_OK;
 146 }
 147
 148 static HRESULT WINAPI Client_get_accChild(IAccessible *iface,
 149         VARIANT varChildID, IDispatch **ppdispChild)
 150 {
 151     Client *This = impl_from_Client(iface);
 152
 153     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varChildID), ppdispChild);
 154
 155     *ppdispChild = NULL;
 156     return E_INVALIDARG;
 157 }
 158
 159 static HRESULT WINAPI Client_get_accName(IAccessible *iface, VARIANT varID, BSTR *pszName)
 160 {
 161     Client *This = impl_from_Client(iface);
 162     WCHAR name[1024];
 163     UINT i, len;
 164
 165     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszName);
 166
 167     *pszName = NULL;
 168     if(convert_child_id(&varID) != CHILDID_SELF || !IsWindow(This->hwnd))
 169         return E_INVALIDARG;
 170
 171     len = SendMessageW(This->hwnd, WM_GETTEXT, ARRAY_SIZE(name), (LPARAM)name);
 172     if(!len)
 173         return S_FALSE;
 174
 175     for(i=0; i<len; i++) {
 176         if(name[i] == '&') {
 177             len--;
 178             memmove(name+i, name+i+1, (len-i)*sizeof(WCHAR));
 179             break;
 180         }
 181     }
 182
 183     *pszName = SysAllocStringLen(name, len);
 184     return *pszName ? S_OK : E_OUTOFMEMORY;
 185 }
 186
 187 static HRESULT WINAPI Client_get_accValue(IAccessible *iface, VARIANT varID, BSTR *pszValue)
 188 {
 189     Client *This = impl_from_Client(iface);
 190
 191     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszValue);
 192
 193     *pszValue = NULL;
 194     if(convert_child_id(&varID) != CHILDID_SELF)
 195         return E_INVALIDARG;
 196     return S_FALSE;
 197 }
 198
 199 static HRESULT WINAPI Client_get_accDescription(IAccessible *iface,
 200         VARIANT varID, BSTR *pszDescription)
 201 {
 202     Client *This = impl_from_Client(iface);
 203
 204     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszDescription);
 205
 206     *pszDescription = NULL;
 207     if(convert_child_id(&varID) != CHILDID_SELF)
 208         return E_INVALIDARG;
 209     return S_FALSE;
 210 }
 211
 212 static HRESULT WINAPI Client_get_accRole(IAccessible *iface, VARIANT varID, VARIANT *pvarRole)
 213 {
 214     Client *This = impl_from_Client(iface);
 215
 216     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pvarRole);
 217
 218     if(convert_child_id(&varID) != CHILDID_SELF) {
 219         V_VT(pvarRole) = VT_EMPTY;
 220         return E_INVALIDARG;
 221     }
 222
 223     V_VT(pvarRole) = VT_I4;
 224     V_I4(pvarRole) = ROLE_SYSTEM_CLIENT;
 225     return S_OK;
 226 }
 227
 228 static HRESULT WINAPI Client_get_accState(IAccessible *iface, VARIANT varID, VARIANT *pvarState)
 229 {
 230     Client *This = impl_from_Client(iface);
 231     LONG style;
 232
 233     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pvarState);
 234
 235     if(convert_child_id(&varID) != CHILDID_SELF) {
 236         V_VT(pvarState) = VT_EMPTY;
 237         return E_INVALIDARG;
 238     }
 239
 240     V_VT(pvarState) = VT_I4;
 241     V_I4(pvarState) = 0;
 242
 243     style = GetWindowLongW(This->hwnd, GWL_STYLE);
 244     if(style & WS_DISABLED)
 245         V_I4(pvarState) |= STATE_SYSTEM_UNAVAILABLE;
 246     else if(IsWindow(This->hwnd))
 247         V_I4(pvarState) |= STATE_SYSTEM_FOCUSABLE;
 248     if(GetFocus() == This->hwnd)
 249         V_I4(pvarState) |= STATE_SYSTEM_FOCUSED;
 250     if(!(style & WS_VISIBLE))
 251         V_I4(pvarState) |= STATE_SYSTEM_INVISIBLE;
 252     return S_OK;
 253 }
 254
 255 static HRESULT WINAPI Client_get_accHelp(IAccessible *iface, VARIANT varID, BSTR *pszHelp)
 256 {
 257     Client *This = impl_from_Client(iface);
 258
 259     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszHelp);
 260
 261     *pszHelp = NULL;
 262     if(convert_child_id(&varID) != CHILDID_SELF)
 263         return E_INVALIDARG;
 264     return S_FALSE;
 265 }
 266
 267 static HRESULT WINAPI Client_get_accHelpTopic(IAccessible *iface,
 268         BSTR *pszHelpFile, VARIANT varID, LONG *pidTopic)
 269 {
 270     Client *This = impl_from_Client(iface);
 271     FIXME("(%p)->(%p %s %p)\n", This, pszHelpFile, debugstr_variant(&varID), pidTopic);
 272     return E_NOTIMPL;
 273 }
 274
 275 static HRESULT WINAPI Client_get_accKeyboardShortcut(IAccessible *iface,
 276         VARIANT varID, BSTR *pszKeyboardShortcut)
 277 {
 278     static const WCHAR shortcut_fmt[] = {'A','l','t','+','!',0};
 279     Client *This = impl_from_Client(iface);
 280     WCHAR name[1024];
 281     UINT i, len;
 282
 283     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszKeyboardShortcut);
 284
 285     *pszKeyboardShortcut = NULL;
 286     if(convert_child_id(&varID) != CHILDID_SELF)
 287         return E_INVALIDARG;
 288
 289     len = SendMessageW(This->hwnd, WM_GETTEXT, ARRAY_SIZE(name), (LPARAM)name);
 290     for(i=0; i<len; i++) {
 291         if(name[i] == '&')
 292             break;
 293     }
 294     if(i+1 >= len)
 295         return S_FALSE;
 296
 297     *pszKeyboardShortcut = SysAllocString(shortcut_fmt);
 298     if(!*pszKeyboardShortcut)
 299         return E_OUTOFMEMORY;
 300
 301     (*pszKeyboardShortcut)[4] = name[i+1];
 302     return S_OK;
 303 }
 304
 305 static HRESULT WINAPI Client_get_accFocus(IAccessible *iface, VARIANT *pvarID)
 306 {
 307     Client *This = impl_from_Client(iface);
 308     FIXME("(%p)->(%p)\n", This, pvarID);
 309     return E_NOTIMPL;
 310 }
 311
 312 static HRESULT WINAPI Client_get_accSelection(IAccessible *iface, VARIANT *pvarID)
 313 {
 314     Client *This = impl_from_Client(iface);
 315     FIXME("(%p)->(%p)\n", This, pvarID);
 316     return E_NOTIMPL;
 317 }
 318
 319 static HRESULT WINAPI Client_get_accDefaultAction(IAccessible *iface,
 320         VARIANT varID, BSTR *pszDefaultAction)
 321 {
 322     Client *This = impl_from_Client(iface);
 323
 324     TRACE("(%p)->(%s %p)\n", This, debugstr_variant(&varID), pszDefaultAction);
 325
 326     *pszDefaultAction = NULL;
 327     if(convert_child_id(&varID) != CHILDID_SELF)
 328         return E_INVALIDARG;
 329     return S_FALSE;
 330 }
 331
 332 static HRESULT WINAPI Client_accSelect(IAccessible *iface, LONG flagsSelect, VARIANT varID)
 333 {
 334     Client *This = impl_from_Client(iface);
 335     FIXME("(%p)->(%x %s)\n", This, flagsSelect, debugstr_variant(&varID));
 336     return E_NOTIMPL;
 337 }
 338
 339 static HRESULT WINAPI Client_accLocation(IAccessible *iface, LONG *pxLeft,
 340         LONG *pyTop, LONG *pcxWidth, LONG *pcyHeight, VARIANT varID)
 341 {
 342     Client *This = impl_from_Client(iface);
 343     RECT rect;
 344     POINT pt;
 345
 346     TRACE("(%p)->(%p %p %p %p %s)\n", This, pxLeft, pyTop,
 347             pcxWidth, pcyHeight, debugstr_variant(&varID));
 348
 349     *pxLeft = *pyTop = *pcxWidth = *pcyHeight = 0;
 350     if(convert_child_id(&varID) != CHILDID_SELF)
 351         return E_INVALIDARG;
 352
 353     if(!GetClientRect(This->hwnd, &rect))
 354         return S_OK;
 355
 356     pt.x = rect.left,
 357     pt.y = rect.top;
 358     MapWindowPoints(This->hwnd, NULL, &pt, 1);
 359     *pxLeft = pt.x;
 360     *pyTop = pt.y;
 361
 362     pt.x = rect.right;
 363     pt.y = rect.bottom;
 364     MapWindowPoints(This->hwnd, NULL, &pt, 1);
 365     *pcxWidth = pt.x - *pxLeft;
 366     *pcyHeight = pt.y - *pyTop;
 367     return S_OK;
 368 }
 369
 370 static HRESULT WINAPI Client_accNavigate(IAccessible *iface,
 371         LONG navDir, VARIANT varStart, VARIANT *pvarEnd)
 372 {
 373     Client *This = impl_from_Client(iface);
 374     FIXME("(%p)->(%d %s %p)\n", This, navDir, debugstr_variant(&varStart), pvarEnd);
 375     return E_NOTIMPL;
 376 }
 377
 378 static HRESULT WINAPI Client_accHitTest(IAccessible *iface,
 379         LONG xLeft, LONG yTop, VARIANT *pvarID)
 380 {
 381     Client *This = impl_from_Client(iface);
 382     HWND child;
 383     POINT pt;
 384
 385     TRACE("(%p)->(%d %d %p)\n", This, xLeft, yTop, pvarID);
 386
 387     V_VT(pvarID) = VT_I4;
 388     V_I4(pvarID) = 0;
 389
 390     pt.x = xLeft;
 391     pt.y = yTop;
 392     if(!IsWindowVisible(This->hwnd) || !ScreenToClient(This->hwnd, &pt))
 393         return S_OK;
 394
 395     child = ChildWindowFromPointEx(This->hwnd, pt, CWP_SKIPINVISIBLE);
 396     if(!child || child==This->hwnd)
 397         return S_OK;
 398
 399     V_VT(pvarID) = VT_DISPATCH;
 400     return AccessibleObjectFromWindow(child, OBJID_WINDOW,
 401             &IID_IDispatch, (void**)&V_DISPATCH(pvarID));
 402 }
 403
 404 static HRESULT WINAPI Client_accDoDefaultAction(IAccessible *iface, VARIANT varID)
 405 {
 406     Client *This = impl_from_Client(iface);
 407     FIXME("(%p)->(%s)\n", This, debugstr_variant(&varID));
 408     return E_NOTIMPL;
 409 }
 410
 411 static HRESULT WINAPI Client_put_accName(IAccessible *iface, VARIANT varID, BSTR pszName)
 412 {
 413     Client *This = impl_from_Client(iface);
 414     FIXME("(%p)->(%s %s)\n", This, debugstr_variant(&varID), debugstr_w(pszName));
 415     return E_NOTIMPL;
 416 }
 417
 418 static HRESULT WINAPI Client_put_accValue(IAccessible *iface, VARIANT varID, BSTR pszValue)
 419 {
 420     Client *This = impl_from_Client(iface);
 421     FIXME("(%p)->(%s %s)\n", This, debugstr_variant(&varID), debugstr_w(pszValue));
 422     return E_NOTIMPL;
 423 }
 424
 425 static const IAccessibleVtbl ClientVtbl = {
 426     Client_QueryInterface,
 427     Client_AddRef,
 428     Client_Release,
 429     Client_GetTypeInfoCount,
 430     Client_GetTypeInfo,
 431     Client_GetIDsOfNames,
 432     Client_Invoke,
 433     Client_get_accParent,
 434     Client_get_accChildCount,
 435     Client_get_accChild,
 436     Client_get_accName,
 437     Client_get_accValue,
 438     Client_get_accDescription,
 439     Client_get_accRole,
 440     Client_get_accState,
 441     Client_get_accHelp,
 442     Client_get_accHelpTopic,
 443     Client_get_accKeyboardShortcut,
 444     Client_get_accFocus,
 445     Client_get_accSelection,
 446     Client_get_accDefaultAction,
 447     Client_accSelect,
 448     Client_accLocation,
 449     Client_accNavigate,
 450     Client_accHitTest,
 451     Client_accDoDefaultAction,
 452     Client_put_accName,
 453     Client_put_accValue
 454 };
 455
 456 static inline Client* impl_from_Client_OleWindow(IOleWindow *iface)
 457 {
 458     return CONTAINING_RECORD(iface, Client, IOleWindow_iface);
 459 }
 460
 461 static HRESULT WINAPI Client_OleWindow_QueryInterface(IOleWindow *iface, REFIID riid, void **ppv)
 462 {
 463     Client *This = impl_from_Client_OleWindow(iface);
 464     return IAccessible_QueryInterface(&This->IAccessible_iface, riid, ppv);
 465 }
 466
 467 static ULONG WINAPI Client_OleWindow_AddRef(IOleWindow *iface)
 468 {
 469     Client *This = impl_from_Client_OleWindow(iface);
 470     return IAccessible_AddRef(&This->IAccessible_iface);
 471 }
 472
 473 static ULONG WINAPI Client_OleWindow_Release(IOleWindow *iface)
 474 {
 475     Client *This = impl_from_Client_OleWindow(iface);
 476     return IAccessible_Release(&This->IAccessible_iface);
 477 }
 478
 479 static HRESULT WINAPI Client_OleWindow_GetWindow(IOleWindow *iface, HWND *phwnd)
 480 {
 481     Client *This = impl_from_Client_OleWindow(iface);
 482
 483     TRACE("(%p)->(%p)\n", This, phwnd);
 484
 485     *phwnd = This->hwnd;
 486     return S_OK;
 487 }
 488
 489 static HRESULT WINAPI Client_OleWindow_ContextSensitiveHelp(IOleWindow *iface, BOOL fEnterMode)
 490 {
 491     Client *This = impl_from_Client_OleWindow(iface);
 492     FIXME("(%p)->(%x)\n", This, fEnterMode);
 493     return E_NOTIMPL;
 494 }
 495
 496 static const IOleWindowVtbl ClientOleWindowVtbl = {
 497     Client_OleWindow_QueryInterface,
 498     Client_OleWindow_AddRef,
 499     Client_OleWindow_Release,
 500     Client_OleWindow_GetWindow,
 501     Client_OleWindow_ContextSensitiveHelp
 502 };
 503
 504 static inline Client* impl_from_Client_EnumVARIANT(IEnumVARIANT *iface)
 505 {
 506     return CONTAINING_RECORD(iface, Client, IEnumVARIANT_iface);
 507 }
 508
 509 static HRESULT WINAPI Client_EnumVARIANT_QueryInterface(IEnumVARIANT *iface, REFIID riid, void **ppv)
 510 {
 511     Client *This = impl_from_Client_EnumVARIANT(iface);
 512     return IAccessible_QueryInterface(&This->IAccessible_iface, riid, ppv);
 513 }
 514
 515 static ULONG WINAPI Client_EnumVARIANT_AddRef(IEnumVARIANT *iface)
 516 {
 517     Client *This = impl_from_Client_EnumVARIANT(iface);
 518     return IAccessible_AddRef(&This->IAccessible_iface);
 519 }
 520
 521 static ULONG WINAPI Client_EnumVARIANT_Release(IEnumVARIANT *iface)
 522 {
 523     Client *This = impl_from_Client_EnumVARIANT(iface);
 524     return IAccessible_Release(&This->IAccessible_iface);
 525 }
 526
 527 static HRESULT WINAPI Client_EnumVARIANT_Next(IEnumVARIANT *iface,
 528         ULONG celt, VARIANT *rgVar, ULONG *pCeltFetched)
 529 {
 530     Client *This = impl_from_Client_EnumVARIANT(iface);
 531     HWND cur = This->enum_pos, next;
 532     ULONG fetched = 0;
 533     HRESULT hr;
 534
 535     TRACE("(%p)->(%u %p %p)\n", This, celt, rgVar, pCeltFetched);
 536
 537     if(!celt) {
 538         if(pCeltFetched)
 539             *pCeltFetched = 0;
 540         return S_OK;
 541     }
 542
 543     if(!This->enum_pos)
 544         next = GetWindow(This->hwnd, GW_CHILD);
 545     else
 546         next = GetWindow(This->enum_pos, GW_HWNDNEXT);
 547
 548     while(next) {
 549         cur = next;
 550
 551         V_VT(rgVar+fetched) = VT_DISPATCH;
 552         hr = AccessibleObjectFromWindow(cur, OBJID_WINDOW,
 553                 &IID_IDispatch, (void**)&V_DISPATCH(rgVar+fetched));
 554         if(FAILED(hr)) {
 555             V_VT(rgVar+fetched) = VT_EMPTY;
 556             while(fetched > 0) {
 557                 VariantClear(rgVar+fetched-1);
 558                 fetched--;
 559             }
 560             if(pCeltFetched)
 561                 *pCeltFetched = 0;
 562             return hr;
 563         }
 564         fetched++;
 565         if(fetched == celt)
 566             break;
 567
 568         next = GetWindow(cur, GW_HWNDNEXT);
 569     }
 570
 571     This->enum_pos = cur;
 572     if(pCeltFetched)
 573         *pCeltFetched = fetched;
 574     return celt == fetched ? S_OK : S_FALSE;
 575 }
 576
 577 static HRESULT WINAPI Client_EnumVARIANT_Skip(IEnumVARIANT *iface, ULONG celt)
 578 {
 579     Client *This = impl_from_Client_EnumVARIANT(iface);
 580     HWND next;
 581
 582     TRACE("(%p)->(%u)\n", This, celt);
 583
 584     while(celt) {
 585         if(!This->enum_pos)
 586             next = GetWindow(This->hwnd, GW_CHILD);
 587         else
 588             next = GetWindow(This->enum_pos, GW_HWNDNEXT);
 589         if(!next)
 590             return S_FALSE;
 591
 592         This->enum_pos = next;
 593         celt--;
 594     }
 595
 596     return S_OK;
 597 }
 598
 599 static HRESULT WINAPI Client_EnumVARIANT_Reset(IEnumVARIANT *iface)
 600 {
 601     Client *This = impl_from_Client_EnumVARIANT(iface);
 602
 603     TRACE("(%p)\n", This);
 604
 605     This->enum_pos = 0;
 606     return S_OK;
 607 }
 608
 609 static HRESULT WINAPI Client_EnumVARIANT_Clone(IEnumVARIANT *iface, IEnumVARIANT **ppEnum)
 610 {
 611     Client *This = impl_from_Client_EnumVARIANT(iface);
 612     FIXME("(%p)->(%p)\n", This, ppEnum);
 613     return E_NOTIMPL;
 614 }
 615
 616 static const IEnumVARIANTVtbl ClientEnumVARIANTVtbl = {
 617     Client_EnumVARIANT_QueryInterface,
 618     Client_EnumVARIANT_AddRef,
 619     Client_EnumVARIANT_Release,
 620     Client_EnumVARIANT_Next,
 621     Client_EnumVARIANT_Skip,
 622     Client_EnumVARIANT_Reset,
 623     Client_EnumVARIANT_Clone
 624 };
 625
 626 HRESULT create_client_object(HWND hwnd, const IID *iid, void **obj)
 627 {
 628     Client *client;
 629     HRESULT hres;
 630
 631     if(!IsWindow(hwnd))
 632         return E_FAIL;
 633
 634     client = heap_alloc_zero(sizeof(Client));
 635     if(!client)
 636         return E_OUTOFMEMORY;
 637
 638     client->IAccessible_iface.lpVtbl = &ClientVtbl;
 639     client->IOleWindow_iface.lpVtbl = &ClientOleWindowVtbl;
 640     client->IEnumVARIANT_iface.lpVtbl = &ClientEnumVARIANTVtbl;
 641     client->ref = 1;
 642     client->hwnd = hwnd;
 643     client->enum_pos = 0;
 644
 645     hres = IAccessible_QueryInterface(&client->IAccessible_iface, iid, obj);
 646     IAccessible_Release(&client->IAccessible_iface);
 647     return hres;
 648 }