git.oblomov.eu Git - wine/blob - dlls/user32/dde_client.c

   1 /*
   2  * DDEML library
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  * Copyright 1997 Len White
   6  * Copyright 1999 Keith Matthews
   7  * Copyright 2000 Corel
   8  * Copyright 2001 Eric Pouech
   9  * Copyright 2004, 2005 Dmitry Timoshkov
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winuser.h"
  32 #include "winerror.h"
  33 #include "winnls.h"
  34 #include "dde.h"
  35 #include "ddeml.h"
  36 #include "win.h"
  37 #include "wine/debug.h"
  38 #include "dde_private.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
  41
  42 static LRESULT CALLBACK WDML_ClientProc(HWND, UINT, WPARAM, LPARAM);    /* only for one client, not conv list */
  43 const char WDML_szClientConvClassA[] = "WineDdeClientA";
  44 const WCHAR WDML_szClientConvClassW[] = {'W','i','n','e','D','d','e','C','l','i','e','n','t','W',0};
  45
  46 /******************************************************************************
  47  * DdeConnectList [USER32.@]  Establishes conversation with DDE servers
  48  *
  49  * PARAMS
  50  *    idInst     [I] Instance identifier
  51  *    hszService [I] Handle to service name string
  52  *    hszTopic   [I] Handle to topic name string
  53  *    hConvList  [I] Handle to conversation list
  54  *    pCC        [I] Pointer to structure with context data
  55  *
  56  * RETURNS
  57  *    Success: Handle to new conversation list
  58  *    Failure: 0
  59  */
  60 HCONVLIST WINAPI DdeConnectList(DWORD idInst, HSZ hszService, HSZ hszTopic,
  61                                 HCONVLIST hConvList, PCONVCONTEXT pCC)
  62 {
  63     FIXME("(%d,%p,%p,%p,%p): stub\n", idInst, hszService, hszTopic, hConvList, pCC);
  64     return (HCONVLIST)1;
  65 }
  66
  67 /*****************************************************************
  68  * DdeQueryNextServer [USER32.@]
  69  */
  70 HCONV WINAPI DdeQueryNextServer(HCONVLIST hConvList, HCONV hConvPrev)
  71 {
  72     FIXME("(%p,%p): stub\n", hConvList, hConvPrev);
  73     return 0;
  74 }
  75
  76 /******************************************************************************
  77  * DdeDisconnectList [USER32.@]  Destroys list and terminates conversations
  78  *
  79  *
  80  * PARAMS
  81  *    hConvList  [I] Handle to conversation list
  82  *
  83  * RETURNS
  84  *    Success: TRUE
  85  *    Failure: FALSE
  86  */
  87 BOOL WINAPI DdeDisconnectList(HCONVLIST hConvList)
  88 {
  89     FIXME("(%p): stub\n", hConvList);
  90     return TRUE;
  91 }
  92
  93 /*****************************************************************
  94  *            DdeConnect   (USER32.@)
  95  */
  96 HCONV WINAPI DdeConnect(DWORD idInst, HSZ hszService, HSZ hszTopic,
  97                         PCONVCONTEXT pCC)
  98 {
  99     HWND                hwndClient;
 100     WDML_INSTANCE*      pInstance;
 101     WDML_CONV*          pConv = NULL;
 102     ATOM                aSrv = 0, aTpc = 0;
 103
 104     TRACE("(0x%x,%p,%p,%p)\n", idInst, hszService, hszTopic, pCC);
 105
 106     pInstance = WDML_GetInstance(idInst);
 107     if (!pInstance)
 108         return NULL;
 109
 110     /* make sure this conv is never created */
 111     pConv = WDML_FindConv(pInstance, WDML_CLIENT_SIDE, hszService, hszTopic);
 112     if (pConv != NULL)
 113     {
 114         ERR("This Conv already exists: (%p)\n", pConv);
 115         return NULL;
 116     }
 117
 118     /* we need to establish a conversation with
 119        server, so create a window for it       */
 120
 121     if (pInstance->unicode)
 122     {
 123         WNDCLASSEXW wndclass;
 124
 125         wndclass.cbSize        = sizeof(wndclass);
 126         wndclass.style         = 0;
 127         wndclass.lpfnWndProc   = WDML_ClientProc;
 128         wndclass.cbClsExtra    = 0;
 129         wndclass.cbWndExtra    = 2 * sizeof(ULONG_PTR);
 130         wndclass.hInstance     = 0;
 131         wndclass.hIcon         = 0;
 132         wndclass.hCursor       = 0;
 133         wndclass.hbrBackground = 0;
 134         wndclass.lpszMenuName  = NULL;
 135         wndclass.lpszClassName = WDML_szClientConvClassW;
 136         wndclass.hIconSm       = 0;
 137
 138         RegisterClassExW(&wndclass);
 139
 140         hwndClient = CreateWindowW(WDML_szClientConvClassW, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
 141     }
 142     else
 143     {
 144         WNDCLASSEXA wndclass;
 145
 146         wndclass.cbSize        = sizeof(wndclass);
 147         wndclass.style         = 0;
 148         wndclass.lpfnWndProc   = WDML_ClientProc;
 149         wndclass.cbClsExtra    = 0;
 150         wndclass.cbWndExtra    = 2 * sizeof(ULONG_PTR);
 151         wndclass.hInstance     = 0;
 152         wndclass.hIcon         = 0;
 153         wndclass.hCursor       = 0;
 154         wndclass.hbrBackground = 0;
 155         wndclass.lpszMenuName  = NULL;
 156         wndclass.lpszClassName = WDML_szClientConvClassA;
 157         wndclass.hIconSm       = 0;
 158
 159         RegisterClassExA(&wndclass);
 160
 161         hwndClient = CreateWindowA(WDML_szClientConvClassA, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
 162     }
 163
 164     SetWindowLongPtrW(hwndClient, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
 165
 166     if (hszService)
 167     {
 168         aSrv = WDML_MakeAtomFromHsz(hszService);
 169         if (!aSrv) goto theEnd;
 170     }
 171     if (hszTopic)
 172     {
 173         aTpc = WDML_MakeAtomFromHsz(hszTopic);
 174         if (!aTpc) goto theEnd;
 175     }
 176
 177     /* note: sent messages shall not use packing */
 178     SendMessageTimeoutW( HWND_BROADCAST, WM_DDE_INITIATE, (WPARAM)hwndClient, MAKELPARAM(aSrv, aTpc),
 179                          SMTO_ABORTIFHUNG, 2000, NULL );
 180
 181     pInstance = WDML_GetInstance(idInst);
 182     if (!pInstance)
 183     {
 184         goto theEnd;
 185     }
 186
 187     /* At this point, Client WM_DDE_ACK should have saved hwndServer
 188        for this instance id and hwndClient if server responds.
 189        So get HCONV and return it. And add it to conv list */
 190     pConv = WDML_GetConvFromWnd(hwndClient);
 191     if (pConv == NULL || pConv->hwndServer == 0)
 192     {
 193         WARN("Done with INITIATE, but no Server window available\n");
 194         pConv = NULL;
 195         goto theEnd;
 196     }
 197     TRACE("Connected to Server window (%p)\n", pConv->hwndServer);
 198     pConv->wConvst = XST_CONNECTED;
 199
 200     /* finish init of pConv */
 201     if (pCC != NULL)
 202     {
 203         pConv->convContext = *pCC;
 204     }
 205     else
 206     {
 207         memset(&pConv->convContext, 0, sizeof(pConv->convContext));
 208         pConv->convContext.cb = sizeof(pConv->convContext);
 209         pConv->convContext.iCodePage = (pInstance->unicode) ? CP_WINUNICODE : CP_WINANSI;
 210     }
 211
 212  theEnd:
 213
 214     if (aSrv) GlobalDeleteAtom(aSrv);
 215     if (aTpc) GlobalDeleteAtom(aTpc);
 216     return (HCONV)pConv;
 217 }
 218
 219 /*****************************************************************
 220  *            DdeReconnect   (DDEML.37)
 221  *            DdeReconnect   (USER32.@)
 222  */
 223 HCONV WINAPI DdeReconnect(HCONV hConv)
 224 {
 225     WDML_CONV*  pConv;
 226     WDML_CONV*  pNewConv = NULL;
 227     ATOM        aSrv = 0, aTpc = 0;
 228
 229     TRACE("(%p)\n", hConv);
 230
 231     pConv = WDML_GetConv(hConv, FALSE);
 232     if (pConv != NULL && (pConv->wStatus & ST_CLIENT))
 233     {
 234         BOOL    ret;
 235
 236         /* to reestablist a connection, we have to make sure that:
 237          * 1/ pConv is the converstation attached to the client window (it wouldn't be
 238          *    if a call to DdeReconnect would have already been done...)
 239          *    FIXME: is this really an error ???
 240          * 2/ the pConv conversation had really been deconnected
 241          */
 242         if (pConv == WDML_GetConvFromWnd(pConv->hwndClient) &&
 243             (pConv->wStatus & ST_TERMINATED) && !(pConv->wStatus & ST_CONNECTED))
 244         {
 245             HWND        hwndClient = pConv->hwndClient;
 246             HWND        hwndServer = pConv->hwndServer;
 247
 248             SetWindowLongPtrW(pConv->hwndClient, GWL_WDML_CONVERSATION, 0);
 249
 250             aSrv = WDML_MakeAtomFromHsz(pConv->hszService);
 251             aTpc = WDML_MakeAtomFromHsz(pConv->hszTopic);
 252             if (!aSrv || !aTpc) goto theEnd;
 253
 254             /* note: sent messages shall not use packing */
 255             ret = SendMessageW(hwndServer, WM_DDE_INITIATE, (WPARAM)hwndClient,
 256                                MAKELPARAM(aSrv, aTpc));
 257
 258             pConv = WDML_GetConv(hConv, FALSE);
 259             if (pConv == NULL)
 260             {
 261                 FIXME("Should fail reconnection\n");
 262                 goto theEnd;
 263             }
 264
 265             if (ret && (pNewConv = WDML_GetConvFromWnd(pConv->hwndClient)) != NULL)
 266             {
 267                 /* re-establish all links... */
 268                 WDML_LINK* pLink;
 269
 270                 for (pLink = pConv->instance->links[WDML_CLIENT_SIDE]; pLink; pLink = pLink->next)
 271                 {
 272                     if (pLink->hConv == hConv)
 273                     {
 274                         /* try to reestablish the links... */
 275                         DdeClientTransaction(NULL, 0, (HCONV)pNewConv, pLink->hszItem, pLink->uFmt,
 276                                              pLink->transactionType, 1000, NULL);
 277                     }
 278                 }
 279             }
 280             else
 281             {
 282                 /* reset the conversation as it was */
 283                 SetWindowLongPtrW(pConv->hwndClient, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
 284             }
 285         }
 286     }
 287
 288  theEnd:
 289
 290     if (aSrv) GlobalDeleteAtom(aSrv);
 291     if (aTpc) GlobalDeleteAtom(aTpc);
 292     return (HCONV)pNewConv;
 293 }
 294
 295 /******************************************************************
 296  *              WDML_ClientQueueAdvise
 297  *
 298  * Creates and queue an WM_DDE_ADVISE transaction
 299  */
 300 static WDML_XACT*       WDML_ClientQueueAdvise(WDML_CONV* pConv, UINT wType, UINT wFmt, HSZ hszItem)
 301 {
 302     DDEADVISE*          pDdeAdvise;
 303     WDML_XACT*          pXAct;
 304     ATOM                atom;
 305
 306     TRACE("XTYP_ADVSTART (with%s data) transaction\n", (wType & XTYPF_NODATA) ? "out" : "");
 307
 308     atom = WDML_MakeAtomFromHsz(hszItem);
 309     if (!atom) return NULL;
 310
 311     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE, wFmt, hszItem);
 312     if (!pXAct)
 313     {
 314         GlobalDeleteAtom(atom);
 315         return NULL;
 316     }
 317
 318     pXAct->wType = wType & ~0x0F;
 319     pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEADVISE));
 320     /* FIXME: hMem is unfreed for now... should be deleted in server */
 321
 322     /* pack DdeAdvise   */
 323     pDdeAdvise = (DDEADVISE*)GlobalLock(pXAct->hMem);
 324     pDdeAdvise->fAckReq   = (wType & XTYPF_ACKREQ) ? TRUE : FALSE;
 325     pDdeAdvise->fDeferUpd = (wType & XTYPF_NODATA) ? TRUE : FALSE;
 326     pDdeAdvise->cfFormat  = wFmt;
 327     GlobalUnlock(pXAct->hMem);
 328
 329     pXAct->lParam = PackDDElParam(WM_DDE_ADVISE, (UINT_PTR)pXAct->hMem, atom);
 330
 331     return pXAct;
 332 }
 333
 334 /******************************************************************
 335  *              WDML_HandleAdviseReply
 336  *
 337  * handles the reply to an advise request
 338  */
 339 static WDML_QUEUE_STATE WDML_HandleAdviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
 340 {
 341     DDEACK              ddeAck;
 342     UINT_PTR            uiLo, uiHi;
 343     HSZ                 hsz;
 344
 345     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 346     {
 347         return WDML_QS_PASS;
 348     }
 349
 350     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 351     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 352
 353     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 354         return WDML_QS_PASS;
 355
 356     GlobalDeleteAtom(uiHi);
 357     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 358
 359     if (ack) *ack = uiLo;
 360     WDML_ExtractAck(uiLo, &ddeAck);
 361
 362     if (ddeAck.fAck)
 363     {
 364         WDML_LINK*      pLink;
 365
 366         /* billx: first to see if the link is already created. */
 367         pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 368                               pXAct->hszItem, TRUE, pXAct->wFmt);
 369         if (pLink != NULL)
 370         {
 371             /* we found a link, and only need to modify it in case it changes */
 372             pLink->transactionType = pXAct->wType;
 373         }
 374         else
 375         {
 376             WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 377                          pXAct->wType, pXAct->hszItem, pXAct->wFmt);
 378         }
 379         pXAct->hDdeData = (HDDEDATA)1;
 380     }
 381     else
 382     {
 383         TRACE("Returning FALSE on XTYP_ADVSTART - fAck was FALSE\n");
 384         GlobalFree(pXAct->hMem);
 385         pXAct->hDdeData = NULL;
 386     }
 387
 388     return WDML_QS_HANDLED;
 389 }
 390
 391 /******************************************************************
 392  *              WDML_ClientQueueUnadvise
 393  *
 394  * queues an unadvise transaction
 395  */
 396 static WDML_XACT*       WDML_ClientQueueUnadvise(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
 397 {
 398     WDML_XACT*  pXAct;
 399     ATOM        atom;
 400
 401     TRACE("XTYP_ADVSTOP transaction\n");
 402
 403     atom = WDML_MakeAtomFromHsz(hszItem);
 404     if (!atom) return NULL;
 405
 406     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE, wFmt, hszItem);
 407     if (!pXAct)
 408     {
 409         GlobalDeleteAtom(atom);
 410         return NULL;
 411     }
 412
 413     /* end advise loop: post WM_DDE_UNADVISE to server to terminate link
 414      * on the specified item.
 415      */
 416     pXAct->lParam = PackDDElParam(WM_DDE_UNADVISE, wFmt, atom);
 417     return pXAct;
 418 }
 419
 420 /******************************************************************
 421  *              WDML_HandleUnadviseReply
 422  *
 423  *
 424  */
 425 static WDML_QUEUE_STATE WDML_HandleUnadviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
 426 {
 427     DDEACK      ddeAck;
 428     UINT_PTR    uiLo, uiHi;
 429     HSZ         hsz;
 430
 431     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 432     {
 433         return WDML_QS_PASS;
 434     }
 435
 436     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 437     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 438
 439     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 440         return WDML_QS_PASS;
 441
 442     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 443     GlobalDeleteAtom(uiHi);
 444
 445     if (ack) *ack = uiLo;
 446     WDML_ExtractAck(uiLo, &ddeAck);
 447
 448     TRACE("WM_DDE_ACK received while waiting for a timeout\n");
 449
 450     if (!ddeAck.fAck)
 451     {
 452         TRACE("Returning FALSE on XTYP_ADVSTOP - fAck was FALSE\n");
 453         pXAct->hDdeData = NULL;
 454     }
 455     else
 456     {
 457         /* billx: remove the link */
 458         WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 459                         pXAct->hszItem, pXAct->wFmt);
 460         pXAct->hDdeData = (HDDEDATA)1;
 461     }
 462     return WDML_QS_HANDLED;
 463 }
 464
 465 /******************************************************************
 466  *              WDML_ClientQueueRequest
 467  *
 468  *
 469  */
 470 static WDML_XACT*       WDML_ClientQueueRequest(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
 471 {
 472     WDML_XACT*  pXAct;
 473     ATOM        atom;
 474
 475     TRACE("XTYP_REQUEST transaction\n");
 476
 477     atom = WDML_MakeAtomFromHsz(hszItem);
 478     if (!atom) return NULL;
 479
 480     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST, wFmt, hszItem);
 481     if (!pXAct)
 482     {
 483         GlobalDeleteAtom(atom);
 484         return NULL;
 485     }
 486
 487     pXAct->lParam = PackDDElParam(WM_DDE_REQUEST, wFmt, atom);
 488
 489     return pXAct;
 490 }
 491
 492 /******************************************************************
 493  *              WDML_HandleRequestReply
 494  *
 495  *
 496  */
 497 static WDML_QUEUE_STATE WDML_HandleRequestReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
 498 {
 499     DDEACK              ddeAck;
 500     WINE_DDEHEAD        wdh;
 501     UINT_PTR            uiLo, uiHi;
 502     HSZ                 hsz;
 503
 504     if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 505         return WDML_QS_PASS;
 506
 507     switch (msg->message)
 508     {
 509     case WM_DDE_ACK:
 510         UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 511         FreeDDElParam(WM_DDE_ACK, msg->lParam);
 512         GlobalDeleteAtom(uiHi);
 513        if (ack) *ack = uiLo;
 514         WDML_ExtractAck(uiLo, &ddeAck);
 515         pXAct->hDdeData = 0;
 516         if (ddeAck.fAck)
 517             ERR("Positive answer should appear in NACK for a request, assuming negative\n");
 518         TRACE("Negative answer...\n");
 519         break;
 520
 521     case WM_DDE_DATA:
 522         UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
 523         TRACE("Got the result (%08x)\n", uiLo);
 524
 525         hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 526
 527         if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 528             return WDML_QS_PASS;
 529
 530         pXAct->hDdeData = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
 531         if (wdh.fRelease)
 532         {
 533             GlobalFree((HGLOBAL)uiLo);
 534         }
 535         if (wdh.fAckReq)
 536         {
 537             WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
 538         }
 539         else
 540         {
 541             GlobalDeleteAtom(uiHi);
 542             FreeDDElParam(WM_DDE_ACK, msg->lParam);
 543         }
 544         break;
 545
 546     default:
 547         FreeDDElParam(msg->message, msg->lParam);
 548         return WDML_QS_PASS;
 549     }
 550
 551     return WDML_QS_HANDLED;
 552 }
 553
 554 /******************************************************************
 555  *              WDML_BuildExecuteCommand
 556  *
 557  * Creates a DDE block suitable for sending in WM_DDE_COMMAND
 558  * It also takes care of string conversion between the two window procedures
 559  */
 560 static  HGLOBAL WDML_BuildExecuteCommand(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
 561 {
 562     HGLOBAL     hMem;
 563     BOOL        clientUnicode, serverUnicode;
 564     DWORD       memSize;
 565
 566     clientUnicode = pConv->instance->unicode;
 567     TRACE("client %p uses unicode = %d\n", pConv->hwndClient, clientUnicode);
 568     /* FIXME: how exactly Windows determines what to use for the server side? */
 569     serverUnicode = IsWindowUnicode(pConv->hwndServer) && IsWindowUnicode(pConv->hwndClient);
 570     TRACE("server %p uses unicode = %d\n", pConv->hwndServer, serverUnicode);
 571
 572     if (clientUnicode == serverUnicode)
 573     {
 574         memSize = cbData;
 575     }
 576     else
 577     {
 578         if (clientUnicode)
 579         {
 580             memSize = WideCharToMultiByte( CP_ACP, 0, pData, cbData, NULL, 0, NULL, NULL);
 581         }
 582         else
 583         {
 584             memSize = MultiByteToWideChar( CP_ACP, 0, pData, cbData, NULL, 0) * sizeof(WCHAR);
 585         }
 586     }
 587
 588     hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, memSize);
 589
 590     if (hMem)
 591     {
 592         LPSTR   pDst;
 593
 594         pDst = GlobalLock(hMem);
 595         if (pDst)
 596         {
 597             if (clientUnicode == serverUnicode)
 598             {
 599                 memcpy(pDst, pData, cbData);
 600             }
 601             else
 602             {
 603                 if (clientUnicode)
 604                 {
 605                     WideCharToMultiByte( CP_ACP, 0, pData, cbData, pDst, memSize, NULL, NULL);
 606                 }
 607                 else
 608                 {
 609                     MultiByteToWideChar( CP_ACP, 0, pData, cbData, (LPWSTR)pDst, memSize/sizeof(WCHAR));
 610                 }
 611             }
 612
 613             GlobalUnlock(hMem);
 614         }
 615         else
 616         {
 617             GlobalFree(hMem);
 618             hMem = 0;
 619         }
 620     }
 621     return hMem;
 622 }
 623
 624 /******************************************************************
 625  *              WDML_ClientQueueExecute
 626  *
 627  *
 628  */
 629 static WDML_XACT*       WDML_ClientQueueExecute(WDML_CONV* pConv, LPVOID pData, DWORD cbData)
 630 {
 631     WDML_XACT*  pXAct;
 632
 633     TRACE("XTYP_EXECUTE transaction\n");
 634
 635     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
 636     if (!pXAct)
 637         return NULL;
 638
 639     if (cbData == (DWORD)-1)
 640     {
 641         HDDEDATA        hDdeData = pData;
 642
 643         pData = DdeAccessData(hDdeData, &cbData);
 644         if (pData)
 645         {
 646             pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
 647             DdeUnaccessData(hDdeData);
 648         }
 649     }
 650     else
 651     {
 652         pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
 653     }
 654
 655     pXAct->lParam = (LPARAM)pXAct->hMem;
 656
 657     return pXAct;
 658 }
 659
 660 /******************************************************************
 661  *              WDML_HandleExecuteReply
 662  *
 663  *
 664  */
 665 static WDML_QUEUE_STATE WDML_HandleExecuteReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
 666 {
 667     DDEACK      ddeAck;
 668     UINT_PTR    uiLo, uiHi;
 669
 670     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 671     {
 672         return WDML_QS_PASS;
 673     }
 674
 675     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 676     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 677
 678     if ((HANDLE)uiHi != pXAct->hMem)
 679     {
 680         return WDML_QS_PASS;
 681     }
 682
 683     if (ack) *ack = uiLo;
 684     WDML_ExtractAck(uiLo, &ddeAck);
 685     pXAct->hDdeData = (HDDEDATA)(UINT_PTR)ddeAck.fAck;
 686
 687     TRACE("hDdeData = %p\n", pXAct->hDdeData);
 688     pConv->instance->lastError = (pXAct->hDdeData != 0) ? DMLERR_NO_ERROR : DMLERR_NOTPROCESSED;
 689
 690     return WDML_QS_HANDLED;
 691 }
 692
 693 /******************************************************************
 694  *              WDML_ClientQueuePoke
 695  *
 696  *
 697  */
 698 static WDML_XACT*       WDML_ClientQueuePoke(WDML_CONV* pConv, LPVOID pData, DWORD cbData,
 699                                              UINT wFmt, HSZ hszItem)
 700 {
 701     WDML_XACT*  pXAct;
 702     ATOM        atom;
 703
 704     TRACE("XTYP_POKE transaction\n");
 705
 706     atom = WDML_MakeAtomFromHsz(hszItem);
 707     if (!atom) return NULL;
 708
 709     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE, wFmt, hszItem);
 710     if (!pXAct)
 711     {
 712         GlobalDeleteAtom(atom);
 713         return NULL;
 714     }
 715
 716     if (cbData == (DWORD)-1)
 717     {
 718         pXAct->hMem = (HDDEDATA)pData;
 719     }
 720     else
 721     {
 722         DDEPOKE*        ddePoke;
 723
 724         pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEPOKE) + cbData);
 725         ddePoke = GlobalLock(pXAct->hMem);
 726         if (ddePoke)
 727         {
 728             memcpy(ddePoke->Value, pData, cbData);
 729             ddePoke->fRelease = FALSE; /* FIXME: app owned ? */
 730             ddePoke->cfFormat = wFmt;
 731             GlobalUnlock(pXAct->hMem);
 732         }
 733     }
 734
 735     pXAct->lParam = PackDDElParam(WM_DDE_POKE, (UINT_PTR)pXAct->hMem, atom);
 736
 737     return pXAct;
 738 }
 739
 740 /******************************************************************
 741  *              WDML_HandlePokeReply
 742  *
 743  *
 744  */
 745 static WDML_QUEUE_STATE WDML_HandlePokeReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
 746 {
 747     UINT_PTR    uiLo, uiHi;
 748     HSZ         hsz;
 749
 750     if (msg->message != WM_DDE_ACK && WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 751     {
 752         return WDML_QS_PASS;
 753     }
 754
 755     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 756     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 757     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 758     {
 759         return WDML_QS_PASS;
 760     }
 761     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 762     GlobalDeleteAtom(uiHi);
 763
 764     if (ack) *ack = uiLo;
 765     GlobalFree(pXAct->hMem);
 766
 767     pXAct->hDdeData = (HDDEDATA)TRUE;
 768     return TRUE;
 769 }
 770
 771 /******************************************************************
 772  *              WDML_ClientQueueTerminate
 773  *
 774  * Creates and queue an WM_DDE_TERMINATE transaction
 775  */
 776 static WDML_XACT*       WDML_ClientQueueTerminate(WDML_CONV* pConv)
 777 {
 778     WDML_XACT*          pXAct;
 779
 780     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
 781     if (!pXAct)
 782         return NULL;
 783
 784     pXAct->lParam = 0;
 785     pConv->wStatus &= ~ST_CONNECTED;
 786
 787     return pXAct;
 788 }
 789
 790 /******************************************************************
 791  *              WDML_HandleTerminateReply
 792  *
 793  * handles the reply to a terminate request
 794  */
 795 static WDML_QUEUE_STATE WDML_HandleTerminateReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 796 {
 797     if (msg->message != WM_DDE_TERMINATE)
 798     {
 799         /* FIXME: should delete data passed here */
 800         return WDML_QS_SWALLOWED;
 801     }
 802
 803     if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 804     {
 805         FIXME("hmmm shouldn't happen\n");
 806         return WDML_QS_PASS;
 807     }
 808     if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
 809     {
 810         WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
 811                             0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
 812     }
 813     WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
 814     return WDML_QS_HANDLED;
 815 }
 816
 817 /******************************************************************
 818  *              WDML_HandleReplyData
 819  *
 820  *
 821  */
 822 static WDML_QUEUE_STATE WDML_HandleIncomingData(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
 823 {
 824     UINT_PTR            uiLo, uiHi;
 825     HDDEDATA            hDdeDataIn, hDdeDataOut;
 826     WDML_LINK*          pLink;
 827     WINE_DDEHEAD        wdh;
 828     HSZ                 hsz;
 829
 830     TRACE("WM_DDE_DATA message received in the Client Proc!\n");
 831     /* wParam -- sending window handle  */
 832     /* lParam -- hDdeData & item HSZ    */
 833
 834     UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
 835     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 836
 837     hDdeDataIn = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
 838
 839     /* billx:
 840      *  For hot link, data should be passed to its callback with
 841      * XTYP_ADVDATA and callback should return the proper status.
 842      */
 843     pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE, hsz,
 844                           uiLo ? TRUE : FALSE, wdh.cfFormat);
 845     if (!pLink)
 846     {
 847         WDML_DecHSZ(pConv->instance, hsz);
 848         DdeFreeDataHandle(hDdeDataIn);
 849         return WDML_QS_PASS;
 850     }
 851
 852     if (hDdeDataIn != 0 && wdh.fAckReq)
 853     {
 854         WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
 855         if (msg->lParam)
 856             msg->lParam = 0;
 857     }
 858     else
 859     {
 860         GlobalDeleteAtom(uiHi);
 861     }
 862
 863     hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_ADVDATA, pLink->uFmt, pLink->hConv,
 864                                       pConv->hszTopic, pLink->hszItem, hDdeDataIn, 0, 0);
 865
 866     if (hDdeDataOut != (HDDEDATA)DDE_FACK || wdh.fRelease)
 867     {
 868         if (uiLo) GlobalFree((HANDLE)uiLo);
 869     }
 870
 871     DdeFreeDataHandle(hDdeDataIn);
 872
 873     WDML_DecHSZ(pConv->instance, hsz);
 874     if (msg->lParam)
 875         FreeDDElParam(WM_DDE_DATA, msg->lParam);
 876
 877     return WDML_QS_HANDLED;
 878 }
 879
 880 /******************************************************************
 881  *              WDML_HandleIncomingTerminate
 882  *
 883  *
 884  */
 885 static WDML_QUEUE_STATE WDML_HandleIncomingTerminate(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
 886 {
 887     if (pConv->hwndServer != WIN_GetFullHandle((HWND)msg->wParam))
 888         return WDML_QS_PASS;
 889
 890     pConv->wStatus |= ST_TERMINATED;
 891     if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
 892     {
 893         WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
 894                             0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
 895     }
 896     if (pConv->wStatus & ST_CONNECTED)
 897     {
 898         /* don't care about result code (if server exists or not) */
 899         PostMessageW(pConv->hwndServer, WM_DDE_TERMINATE, (WPARAM)pConv->hwndClient, 0L);
 900         pConv->wStatus &= ~ST_CONNECTED;
 901     }
 902     /* have to keep connection around to allow reconnection */
 903     return WDML_QS_HANDLED;
 904 }
 905
 906 /******************************************************************
 907  *              WDML_HandleReply
 908  *
 909  * handles any incoming reply, and try to match to an already sent request
 910  */
 911 static WDML_QUEUE_STATE WDML_HandleReply(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd, DWORD *ack)
 912 {
 913     WDML_XACT*          pXAct = pConv->transactions;
 914     WDML_QUEUE_STATE    qs;
 915
 916     if (pConv->transactions)
 917     {
 918         /* first check message against a pending transaction, if any */
 919         switch (pXAct->ddeMsg)
 920         {
 921         case WM_DDE_ADVISE:
 922             qs = WDML_HandleAdviseReply(pConv, msg, pXAct, ack);
 923             break;
 924         case WM_DDE_UNADVISE:
 925             qs = WDML_HandleUnadviseReply(pConv, msg, pXAct, ack);
 926             break;
 927         case WM_DDE_EXECUTE:
 928             qs = WDML_HandleExecuteReply(pConv, msg, pXAct, ack);
 929             break;
 930         case WM_DDE_REQUEST:
 931             qs = WDML_HandleRequestReply(pConv, msg, pXAct, ack);
 932             break;
 933         case WM_DDE_POKE:
 934             qs = WDML_HandlePokeReply(pConv, msg, pXAct, ack);
 935             break;
 936         case WM_DDE_TERMINATE:
 937             qs = WDML_HandleTerminateReply(pConv, msg, pXAct);
 938             break;
 939         default:
 940             qs = WDML_QS_ERROR;
 941             FIXME("oooch\n");
 942         }
 943     }
 944     else
 945     {
 946         qs = WDML_QS_PASS;
 947     }
 948
 949     /* now check the results */
 950     switch (qs)
 951     {
 952     case WDML_QS_ERROR:
 953     case WDML_QS_SWALLOWED:
 954         *hdd = 0;
 955         break;
 956     case WDML_QS_HANDLED:
 957         /* ok, we have resolved a pending transaction
 958          * notify callback if asynchronous, and remove it in any case
 959          */
 960         WDML_UnQueueTransaction(pConv, pXAct);
 961         if (pXAct->dwTimeout == TIMEOUT_ASYNC && pXAct->ddeMsg != WM_DDE_TERMINATE)
 962         {
 963             WDML_InvokeCallback(pConv->instance, XTYP_XACT_COMPLETE, pXAct->wFmt,
 964                                 (HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
 965                                 pXAct->hDdeData, MAKELONG(0, pXAct->xActID), 0 /* FIXME */);
 966             qs = WDML_QS_PASS;
 967         }
 968         else
 969         {
 970             *hdd = pXAct->hDdeData;
 971         }
 972         WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
 973         break;
 974     case WDML_QS_PASS:
 975         /* no pending transaction found, try a warm/hot link or a termination request */
 976         switch (msg->message)
 977         {
 978         case WM_DDE_DATA:
 979             qs = WDML_HandleIncomingData(pConv, msg, hdd);
 980             break;
 981         case WM_DDE_TERMINATE:
 982             qs = WDML_HandleIncomingTerminate(pConv, msg, hdd);
 983             break;
 984         }
 985         break;
 986     case WDML_QS_BLOCK:
 987         FIXME("shouldn't be used on client side\n");
 988         break;
 989     }
 990
 991     return qs;
 992 }
 993
 994 /******************************************************************
 995  *              WDML_SyncWaitTransactionReply
 996  *
 997  * waits until an answer for a sent request is received
 998  * time out is also handled. only used for synchronous transactions
 999  */
1000 static HDDEDATA WDML_SyncWaitTransactionReply(HCONV hConv, DWORD dwTimeout, WDML_XACT* pXAct, DWORD *ack)
1001 {
1002     DWORD       dwTime;
1003     DWORD       err;
1004     WDML_CONV*  pConv;
1005
1006     TRACE("Starting wait for a timeout of %d ms\n", dwTimeout);
1007
1008     /* FIXME: time 32 bit wrap around */
1009     dwTimeout += GetCurrentTime();
1010
1011     while ((dwTime = GetCurrentTime()) < dwTimeout)
1012     {
1013         /* we cannot be in the crit sect all the time because when client and server run in a
1014          * single process they need to share the access to the internal data
1015          */
1016         if (MsgWaitForMultipleObjects(0, NULL, FALSE,
1017                                       dwTimeout - dwTime, QS_POSTMESSAGE) == WAIT_OBJECT_0)
1018         {
1019             MSG         msg;
1020
1021             while (PeekMessageW(&msg, 0, WM_DDE_FIRST, WM_DDE_LAST, PM_REMOVE))
1022             {
1023                 HDDEDATA hdd;
1024
1025                 pConv = WDML_GetConv(hConv, FALSE);
1026                 if (pConv == NULL)
1027                 {
1028                     /* conversation no longer available... return failure */
1029                     return 0;
1030                 }
1031                 if (msg.hwnd == pConv->hwndClient)
1032                 {
1033                     /* check that either pXAct has been processed or no more xActions are pending */
1034                     BOOL ret = (pConv->transactions == pXAct);
1035                     if (WDML_HandleReply(pConv, &msg, &hdd, ack) == WDML_QS_HANDLED)
1036                     {
1037                         TRACE("WDML_HandleReply returned WDML_QS_HANDLED\n");
1038                         ret = TRUE;
1039                     }
1040                     else
1041                         ret = (pConv->transactions == NULL || ret);
1042
1043                     if (ret)
1044                     {
1045                         pConv->instance->lastError = hdd ? DMLERR_NO_ERROR : DMLERR_NOTPROCESSED;
1046                         return hdd;
1047                     }
1048                 }
1049                 else
1050                 {
1051                     DispatchMessageW(&msg);
1052                 }
1053             }
1054         }
1055     }
1056
1057     TRACE("Timeout !!\n");
1058
1059     pConv = WDML_GetConv(hConv, FALSE);
1060     if (pConv != NULL)
1061     {
1062         if (pConv->transactions)
1063         {
1064             switch (pConv->transactions->ddeMsg)
1065             {
1066             case WM_DDE_ADVISE:         err = DMLERR_ADVACKTIMEOUT;     break;
1067             case WM_DDE_REQUEST:        err = DMLERR_DATAACKTIMEOUT;    break;
1068             case WM_DDE_EXECUTE:        err = DMLERR_EXECACKTIMEOUT;    break;
1069             case WM_DDE_POKE:           err = DMLERR_POKEACKTIMEOUT;    break;
1070             case WM_DDE_UNADVISE:       err = DMLERR_UNADVACKTIMEOUT;   break;
1071             default:                    err = DMLERR_INVALIDPARAMETER;  break;
1072             }
1073
1074             pConv->instance->lastError = err;
1075         }
1076     }
1077
1078     return 0;
1079 }
1080
1081 /*****************************************************************
1082  *            DdeClientTransaction  (USER32.@)
1083  */
1084 HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HSZ hszItem, UINT wFmt,
1085                                      UINT wType, DWORD dwTimeout, LPDWORD pdwResult)
1086 {
1087     WDML_CONV*          pConv;
1088     WDML_XACT*          pXAct;
1089     HDDEDATA            hDdeData = 0;
1090
1091     TRACE("(%p,%d,%p,%p,%x,%x,%d,%p)\n",
1092           pData, cbData, hConv, hszItem, wFmt, wType, dwTimeout, pdwResult);
1093
1094     if (hConv == 0)
1095     {
1096         WARN("Invalid conversation handle NULL\n");
1097         return 0;
1098     }
1099
1100     pConv = WDML_GetConv(hConv, TRUE);
1101     if (pConv == NULL)
1102     {
1103         /* cannot set error... cannot get back to DDE instance */
1104         return 0;
1105     }
1106
1107     switch (wType)
1108     {
1109     case XTYP_EXECUTE:
1110         /* Windows simply ignores hszItem and wFmt in this case */
1111         pXAct = WDML_ClientQueueExecute(pConv, pData, cbData);
1112         break;
1113     case XTYP_POKE:
1114         pXAct = WDML_ClientQueuePoke(pConv, pData, cbData, wFmt, hszItem);
1115         break;
1116     case XTYP_ADVSTART|XTYPF_NODATA:
1117     case XTYP_ADVSTART|XTYPF_NODATA|XTYPF_ACKREQ:
1118     case XTYP_ADVSTART:
1119     case XTYP_ADVSTART|XTYPF_ACKREQ:
1120         if (pData)
1121         {
1122             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1123             return 0;
1124         }
1125         pXAct = WDML_ClientQueueAdvise(pConv, wType, wFmt, hszItem);
1126         break;
1127     case XTYP_ADVSTOP:
1128         if (pData)
1129         {
1130             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1131             return 0;
1132         }
1133         pXAct = WDML_ClientQueueUnadvise(pConv, wFmt, hszItem);
1134         break;
1135     case XTYP_REQUEST:
1136         if (pData)
1137         {
1138             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1139             return 0;
1140         }
1141         pXAct = WDML_ClientQueueRequest(pConv, wFmt, hszItem);
1142         break;
1143     default:
1144         FIXME("Unknown transaction type %04x\n", wType);
1145         /* unknown transaction type */
1146         pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1147         return 0;
1148     }
1149
1150     if (pXAct == NULL)
1151     {
1152         pConv->instance->lastError = DMLERR_MEMORY_ERROR;
1153         return 0;
1154     }
1155
1156     WDML_QueueTransaction(pConv, pXAct);
1157
1158     if (!PostMessageW(pConv->hwndServer, pXAct->ddeMsg, (WPARAM)pConv->hwndClient, pXAct->lParam))
1159     {
1160         WARN("Failed posting message %x to %p (error=0x%x)\n",
1161               pXAct->ddeMsg, pConv->hwndServer, GetLastError());
1162         pConv->wStatus &= ~ST_CONNECTED;
1163         WDML_UnQueueTransaction(pConv, pXAct);
1164         WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1165         pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
1166         return 0;
1167     }
1168     pXAct->dwTimeout = dwTimeout;
1169     /* FIXME: should set the app bits on *pdwResult */
1170
1171     if (dwTimeout == TIMEOUT_ASYNC)
1172     {
1173         if (pdwResult)
1174         {
1175             *pdwResult = MAKELONG(0, pXAct->xActID);
1176         }
1177         hDdeData = (HDDEDATA)1;
1178     }
1179     else
1180         hDdeData = WDML_SyncWaitTransactionReply(hConv, dwTimeout, pXAct, pdwResult);
1181
1182     return hDdeData;
1183 }
1184
1185 /*****************************************************************
1186  *            DdeAbandonTransaction (USER32.@)
1187  */
1188 BOOL WINAPI DdeAbandonTransaction(DWORD idInst, HCONV hConv, DWORD idTransaction)
1189 {
1190     WDML_INSTANCE*      pInstance;
1191     WDML_CONV*          pConv;
1192     WDML_XACT*          pXAct;
1193
1194     TRACE("(%08x,%p,%08x);\n", idInst, hConv, idTransaction);
1195
1196     if ((pInstance = WDML_GetInstance(idInst)))
1197     {
1198         if (hConv)
1199         {
1200             if ((pConv = WDML_GetConv(hConv, TRUE)) && pConv->instance == pInstance)
1201             {
1202                 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1203                 {
1204                     if (pXAct->dwTimeout == TIMEOUT_ASYNC &&
1205                         (idTransaction == 0 || pXAct->xActID == idTransaction))
1206                     {
1207                         WDML_UnQueueTransaction(pConv, pXAct);
1208                         WDML_FreeTransaction(pInstance, pXAct, TRUE);
1209                     }
1210                 }
1211             }
1212         }
1213         else
1214         {
1215             for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv; pConv = pConv->next)
1216             {
1217                 if (!(pConv->wStatus & ST_CONNECTED)) continue;
1218                 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1219                 {
1220                     if (pXAct->dwTimeout == TIMEOUT_ASYNC)
1221                     {
1222                         WDML_UnQueueTransaction(pConv, pXAct);
1223                         WDML_FreeTransaction(pInstance, pXAct, TRUE);
1224                     }
1225                 }
1226             }
1227         }
1228     }
1229
1230     return TRUE;
1231 }
1232
1233 /******************************************************************
1234  *              WDML_ClientProc
1235  *
1236  * Window Proc created on client side for each conversation
1237  */
1238 static LRESULT CALLBACK WDML_ClientProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
1239 {
1240     UINT        uiLo, uiHi;
1241     WDML_CONV*  pConv = NULL;
1242     HSZ         hszSrv, hszTpc;
1243
1244     TRACE("%p %04x %08x %08lx\n", hwnd, iMsg, wParam , lParam);
1245
1246     if (iMsg == WM_DDE_ACK &&
1247         /* in the initial WM_INITIATE sendmessage */
1248         ((pConv = WDML_GetConvFromWnd(hwnd)) == NULL || pConv->wStatus == XST_INIT1))
1249     {
1250         /* In response to WM_DDE_INITIATE, save server window  */
1251         char            buf[256];
1252         WDML_INSTANCE*  pInstance;
1253
1254         /* note: sent messages do not need packing */
1255         uiLo = LOWORD(lParam);
1256         uiHi = HIWORD(lParam);
1257
1258         /* FIXME: convlist should be handled here */
1259         if (pConv)
1260         {
1261             /* we already have started the conv with a server, drop other replies */
1262             GlobalDeleteAtom(uiLo);
1263             GlobalDeleteAtom(uiHi);
1264             PostMessageW((HWND)wParam, WM_DDE_TERMINATE, (WPARAM)hwnd, 0);
1265             return 0;
1266         }
1267
1268         pInstance = WDML_GetInstanceFromWnd(hwnd);
1269
1270         hszSrv = WDML_MakeHszFromAtom(pInstance, uiLo);
1271         hszTpc = WDML_MakeHszFromAtom(pInstance, uiHi);
1272
1273         pConv = WDML_AddConv(pInstance, WDML_CLIENT_SIDE, hszSrv, hszTpc, hwnd, (HWND)wParam);
1274
1275         SetWindowLongPtrW(hwnd, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
1276         pConv->wStatus |= ST_CONNECTED;
1277         pConv->wConvst = XST_INIT1;
1278
1279         /* check if server is handled by DDEML */
1280         if ((GetClassNameA((HWND)wParam, buf, sizeof(buf)) &&
1281              lstrcmpiA(buf, WDML_szServerConvClassA) == 0) ||
1282             (GetClassNameW((HWND)wParam, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
1283              lstrcmpiW((LPWSTR)buf, WDML_szServerConvClassW) == 0))
1284         {
1285             pConv->wStatus |= ST_ISLOCAL;
1286         }
1287
1288         WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_CONNECT_CONFIRM, (WPARAM)hwnd, wParam);
1289
1290         GlobalDeleteAtom(uiLo);
1291         GlobalDeleteAtom(uiHi);
1292
1293         /* accept conversation */
1294         return 1;
1295     }
1296
1297     if (iMsg >= WM_DDE_FIRST && iMsg <= WM_DDE_LAST)
1298     {
1299         pConv = WDML_GetConvFromWnd(hwnd);
1300
1301         if (pConv)
1302         {
1303             MSG         msg;
1304             HDDEDATA    hdd;
1305
1306             msg.hwnd = hwnd;
1307             msg.message = iMsg;
1308             msg.wParam = wParam;
1309             msg.lParam = lParam;
1310
1311             WDML_HandleReply(pConv, &msg, &hdd, NULL);
1312         }
1313
1314         return 0;
1315     }
1316
1317     return IsWindowUnicode(hwnd) ? DefWindowProcW(hwnd, iMsg, wParam, lParam) :
1318                                    DefWindowProcA(hwnd, iMsg, wParam, lParam);
1319 }
1320
1321 /*****************************************************************
1322  *            DdeDisconnect   (USER32.@)
1323  */
1324 BOOL WINAPI DdeDisconnect(HCONV hConv)
1325 {
1326     WDML_CONV*  pConv = NULL;
1327     WDML_XACT*  pXAct;
1328     BOOL        ret = FALSE;
1329
1330     TRACE("(%p)\n", hConv);
1331
1332     if (hConv == 0)
1333     {
1334         WARN("DdeDisconnect(): hConv = 0\n");
1335         return FALSE;
1336     }
1337
1338     pConv = WDML_GetConv(hConv, TRUE);
1339     if (pConv != NULL)
1340     {
1341         if (pConv->wStatus & ST_CLIENT)
1342         {
1343             /* FIXME: should abandon all pending transactions */
1344             pXAct = WDML_ClientQueueTerminate(pConv);
1345             if (pXAct != NULL)
1346             {
1347                 if (PostMessageW(pConv->hwndServer, pXAct->ddeMsg,
1348                                  (WPARAM)pConv->hwndClient, pXAct->lParam))
1349                 {
1350                     WDML_SyncWaitTransactionReply(hConv, 10000, pXAct, NULL);
1351                     ret = TRUE;
1352                 }
1353                 else
1354                     pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
1355
1356                 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1357                 /* still have to destroy data assosiated with conversation */
1358                 WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
1359             }
1360             else
1361             {
1362                 FIXME("Not implemented yet for a server side conversation\n");
1363             }
1364         }
1365     }
1366
1367     return ret;
1368 }
1369
1370 /*****************************************************************
1371  *            DdeImpersonateClient (USER32.@)
1372  */
1373 BOOL WINAPI DdeImpersonateClient(HCONV hConv)
1374 {
1375     WDML_CONV*  pConv;
1376     BOOL        ret = FALSE;
1377
1378     TRACE("(%p)\n", hConv);
1379
1380     pConv = WDML_GetConv(hConv, TRUE);
1381     if (pConv)
1382     {
1383         ret = ImpersonateDdeClientWindow(pConv->hwndClient, pConv->hwndServer);
1384     }
1385     return ret;
1386 }