dlls/user/dde/client.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2
   3 /*
   4  * DDEML library
   5  *
   6  * Copyright 1997 Alexandre Julliard
   7  * Copyright 1997 Len White
   8  * Copyright 1999 Keith Matthews
   9  * Copyright 2000 Corel
  10  * Copyright 2001 Eric Pouech
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public
  14  * License as published by the Free Software Foundation; either
  15  * version 2.1 of the License, or (at your option) any later version.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this library; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #include <stdarg.h>
  28 #include <string.h>
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "wingdi.h"
  32 #include "winuser.h"
  33 #include "winerror.h"
  34 #include "winnls.h"
  35 #include "dde.h"
  36 #include "ddeml.h"
  37 #include "win.h"
  38 #include "wine/debug.h"
  39 #include "dde/dde_private.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
  42
  43 static LRESULT CALLBACK WDML_ClientProc(HWND, UINT, WPARAM, LPARAM);    /* only for one client, not conv list */
  44 const char  WDML_szClientConvClassA[] = "DdeClientAnsi";
  45 const WCHAR WDML_szClientConvClassW[] = {'D','d','e','C','l','i','e','n','t','U','n','i','c','o','d','e',0};
  46
  47 /******************************************************************************
  48  * DdeConnectList [USER32.@]  Establishes conversation with DDE servers
  49  *
  50  * PARAMS
  51  *    idInst     [I] Instance identifier
  52  *    hszService [I] Handle to service name string
  53  *    hszTopic   [I] Handle to topic name string
  54  *    hConvList  [I] Handle to conversation list
  55  *    pCC        [I] Pointer to structure with context data
  56  *
  57  * RETURNS
  58  *    Success: Handle to new conversation list
  59  *    Failure: 0
  60  */
  61 HCONVLIST WINAPI DdeConnectList(DWORD idInst, HSZ hszService, HSZ hszTopic,
  62                                 HCONVLIST hConvList, PCONVCONTEXT pCC)
  63 {
  64     FIXME("(%ld,%p,%p,%p,%p): stub\n", idInst, hszService, hszTopic, hConvList, pCC);
  65     return (HCONVLIST)1;
  66 }
  67
  68 /*****************************************************************
  69  * DdeQueryNextServer [USER32.@]
  70  */
  71 HCONV WINAPI DdeQueryNextServer(HCONVLIST hConvList, HCONV hConvPrev)
  72 {
  73     FIXME("(%p,%p): stub\n", hConvList, hConvPrev);
  74     return 0;
  75 }
  76
  77 /******************************************************************************
  78  * DdeDisconnectList [USER32.@]  Destroys list and terminates conversations
  79  *
  80  *
  81  * PARAMS
  82  *    hConvList  [I] Handle to conversation list
  83  *
  84  * RETURNS
  85  *    Success: TRUE
  86  *    Failure: FALSE
  87  */
  88 BOOL WINAPI DdeDisconnectList(HCONVLIST hConvList)
  89 {
  90     FIXME("(%p): stub\n", hConvList);
  91     return TRUE;
  92 }
  93
  94 /*****************************************************************
  95  *            DdeConnect   (USER32.@)
  96  */
  97 HCONV WINAPI DdeConnect(DWORD idInst, HSZ hszService, HSZ hszTopic,
  98                         PCONVCONTEXT pCC)
  99 {
 100     HWND                hwndClient;
 101     WDML_INSTANCE*      pInstance;
 102     WDML_CONV*          pConv = NULL;
 103     ATOM                aSrv = 0, aTpc = 0;
 104
 105     TRACE("(0x%lx,%p,%p,%p)\n", idInst, hszService, hszTopic, pCC);
 106
 107     EnterCriticalSection(&WDML_CritSect);
 108
 109     pInstance = WDML_GetInstance(idInst);
 110     if (!pInstance)
 111     {
 112         goto theEnd;
 113     }
 114
 115     /* make sure this conv is never created */
 116     pConv = WDML_FindConv(pInstance, WDML_CLIENT_SIDE, hszService, hszTopic);
 117     if (pConv != NULL)
 118     {
 119         ERR("This Conv already exists: (%p)\n", pConv);
 120         goto theEnd;
 121     }
 122
 123     /* we need to establish a conversation with
 124        server, so create a window for it       */
 125
 126     if (pInstance->unicode)
 127     {
 128         WNDCLASSEXW     wndclass;
 129
 130         wndclass.cbSize        = sizeof(wndclass);
 131         wndclass.style         = 0;
 132         wndclass.lpfnWndProc   = WDML_ClientProc;
 133         wndclass.cbClsExtra    = 0;
 134         wndclass.cbWndExtra    = 2 * sizeof(DWORD);
 135         wndclass.hInstance     = 0;
 136         wndclass.hIcon         = 0;
 137         wndclass.hCursor       = 0;
 138         wndclass.hbrBackground = 0;
 139         wndclass.lpszMenuName  = NULL;
 140         wndclass.lpszClassName = WDML_szClientConvClassW;
 141         wndclass.hIconSm       = 0;
 142
 143         RegisterClassExW(&wndclass);
 144
 145         hwndClient = CreateWindowW(WDML_szClientConvClassW, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
 146     }
 147     else
 148     {
 149         WNDCLASSEXA     wndclass;
 150
 151         wndclass.cbSize        = sizeof(wndclass);
 152         wndclass.style         = 0;
 153         wndclass.lpfnWndProc   = WDML_ClientProc;
 154         wndclass.cbClsExtra    = 0;
 155         wndclass.cbWndExtra    = 2 * sizeof(DWORD);
 156         wndclass.hInstance     = 0;
 157         wndclass.hIcon         = 0;
 158         wndclass.hCursor       = 0;
 159         wndclass.hbrBackground = 0;
 160         wndclass.lpszMenuName  = NULL;
 161         wndclass.lpszClassName = WDML_szClientConvClassA;
 162         wndclass.hIconSm       = 0;
 163
 164         RegisterClassExA(&wndclass);
 165
 166         hwndClient = CreateWindowA(WDML_szClientConvClassA, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
 167     }
 168
 169     SetWindowLongA(hwndClient, GWL_WDML_INSTANCE, (DWORD)pInstance);
 170
 171     if (hszService)
 172     {
 173         aSrv = WDML_MakeAtomFromHsz(hszService);
 174         if (!aSrv) goto theEnd;
 175     }
 176     if (hszTopic)
 177     {
 178         aTpc = WDML_MakeAtomFromHsz(hszTopic);
 179         if (!aTpc) goto theEnd;
 180     }
 181
 182     LeaveCriticalSection(&WDML_CritSect);
 183
 184     /* note: sent messages shall not use packing */
 185     SendMessageTimeoutW( HWND_BROADCAST, WM_DDE_INITIATE, (WPARAM)hwndClient, MAKELPARAM(aSrv, aTpc),
 186                          SMTO_ABORTIFHUNG, 2000, NULL );
 187
 188     EnterCriticalSection(&WDML_CritSect);
 189
 190     pInstance = WDML_GetInstance(idInst);
 191     if (!pInstance)
 192     {
 193         goto theEnd;
 194     }
 195
 196     /* At this point, Client WM_DDE_ACK should have saved hwndServer
 197        for this instance id and hwndClient if server responds.
 198        So get HCONV and return it. And add it to conv list */
 199     pConv = WDML_GetConvFromWnd(hwndClient);
 200     if (pConv == NULL || pConv->hwndServer == 0)
 201     {
 202         ERR("Done with INITIATE, but no Server window available\n");
 203         pConv = NULL;
 204         goto theEnd;
 205     }
 206     TRACE("Connected to Server window (%p)\n", pConv->hwndServer);
 207     pConv->wConvst = XST_CONNECTED;
 208
 209     /* finish init of pConv */
 210     if (pCC != NULL)
 211     {
 212         pConv->convContext = *pCC;
 213     }
 214     else
 215     {
 216         memset(&pConv->convContext, 0, sizeof(pConv->convContext));
 217         pConv->convContext.cb = sizeof(pConv->convContext);
 218         pConv->convContext.iCodePage = (pInstance->unicode) ? CP_WINUNICODE : CP_WINANSI;
 219     }
 220
 221  theEnd:
 222     LeaveCriticalSection(&WDML_CritSect);
 223
 224     if (aSrv) GlobalDeleteAtom(aSrv);
 225     if (aTpc) GlobalDeleteAtom(aTpc);
 226     return (HCONV)pConv;
 227 }
 228
 229 /*****************************************************************
 230  *            DdeReconnect   (DDEML.37)
 231  *            DdeReconnect   (USER32.@)
 232  */
 233 HCONV WINAPI DdeReconnect(HCONV hConv)
 234 {
 235     WDML_CONV*  pConv;
 236     WDML_CONV*  pNewConv = NULL;
 237     ATOM        aSrv = 0, aTpc = 0;
 238
 239     TRACE("(%p)\n", hConv);
 240
 241     EnterCriticalSection(&WDML_CritSect);
 242     pConv = WDML_GetConv(hConv, FALSE);
 243     if (pConv != NULL && (pConv->wStatus & ST_CLIENT))
 244     {
 245         BOOL    ret;
 246
 247         /* to reestablist a connection, we have to make sure that:
 248          * 1/ pConv is the converstation attached to the client window (it wouldn't be
 249          *    if a call to DdeReconnect would have already been done...)
 250          *    FIXME: is this really an error ???
 251          * 2/ the pConv conversation had really been deconnected
 252          */
 253         if (pConv == WDML_GetConvFromWnd(pConv->hwndClient) &&
 254             (pConv->wStatus & ST_TERMINATED) && !(pConv->wStatus & ST_CONNECTED))
 255         {
 256             HWND        hwndClient = pConv->hwndClient;
 257             HWND        hwndServer = pConv->hwndServer;
 258             ATOM        aSrv, aTpc;
 259
 260             SetWindowLongA(pConv->hwndClient, GWL_WDML_CONVERSATION, 0);
 261
 262             aSrv = WDML_MakeAtomFromHsz(pConv->hszService);
 263             aTpc = WDML_MakeAtomFromHsz(pConv->hszTopic);
 264             if (!aSrv || !aTpc) goto theEnd;
 265
 266             LeaveCriticalSection(&WDML_CritSect);
 267
 268             /* note: sent messages shall not use packing */
 269             ret = SendMessageA(hwndServer, WM_DDE_INITIATE, (WPARAM)hwndClient,
 270                                MAKELPARAM(aSrv, aTpc));
 271
 272             EnterCriticalSection(&WDML_CritSect);
 273
 274             pConv = WDML_GetConv(hConv, FALSE);
 275             if (pConv == NULL)
 276             {
 277                 FIXME("Should fail reconnection\n");
 278                 goto theEnd;
 279             }
 280
 281             if (ret && (pNewConv = WDML_GetConvFromWnd(pConv->hwndClient)) != NULL)
 282             {
 283                 /* re-establish all links... */
 284                 WDML_LINK* pLink;
 285
 286                 for (pLink = pConv->instance->links[WDML_CLIENT_SIDE]; pLink; pLink = pLink->next)
 287                 {
 288                     if (pLink->hConv == hConv)
 289                     {
 290                         /* try to reestablish the links... */
 291                         DdeClientTransaction(NULL, 0, (HCONV)pNewConv, pLink->hszItem, pLink->uFmt,
 292                                              pLink->transactionType, 1000, NULL);
 293                     }
 294                 }
 295             }
 296             else
 297             {
 298                 /* reset the conversation as it was */
 299                 SetWindowLongA(pConv->hwndClient, GWL_WDML_CONVERSATION, (DWORD)pConv);
 300             }
 301         }
 302     }
 303
 304  theEnd:
 305     LeaveCriticalSection(&WDML_CritSect);
 306
 307     if (aSrv) GlobalDeleteAtom(aSrv);
 308     if (aTpc) GlobalDeleteAtom(aTpc);
 309     return (HCONV)pNewConv;
 310 }
 311
 312 /******************************************************************
 313  *              WDML_ClientQueueAdvise
 314  *
 315  * Creates and queue an WM_DDE_ADVISE transaction
 316  */
 317 static WDML_XACT*       WDML_ClientQueueAdvise(WDML_CONV* pConv, UINT wType, UINT wFmt, HSZ hszItem)
 318 {
 319     DDEADVISE*          pDdeAdvise;
 320     WDML_XACT*          pXAct;
 321     ATOM                atom;
 322
 323     TRACE("XTYP_ADVSTART (with%s data) transaction\n", (wType & XTYPF_NODATA) ? "out" : "");
 324
 325     atom = WDML_MakeAtomFromHsz(hszItem);
 326     if (!atom) return NULL;
 327
 328     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE, wFmt, hszItem);
 329     if (!pXAct)
 330     {
 331         GlobalDeleteAtom(atom);
 332         return NULL;
 333     }
 334
 335     pXAct->wType = wType & ~0x0F;
 336     pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEADVISE));
 337     /* FIXME: hMem is unfreed for now... should be deleted in server */
 338
 339     /* pack DdeAdvise   */
 340     pDdeAdvise = (DDEADVISE*)GlobalLock(pXAct->hMem);
 341     pDdeAdvise->fAckReq   = (wType & XTYPF_ACKREQ) ? TRUE : FALSE;
 342     pDdeAdvise->fDeferUpd = (wType & XTYPF_NODATA) ? TRUE : FALSE;
 343     pDdeAdvise->cfFormat  = wFmt;
 344     GlobalUnlock(pXAct->hMem);
 345
 346     pXAct->lParam = PackDDElParam(WM_DDE_ADVISE, (UINT_PTR)pXAct->hMem, atom);
 347
 348     return pXAct;
 349 }
 350
 351 /******************************************************************
 352  *              WDML_HandleAdviseReply
 353  *
 354  * handles the reply to an advise request
 355  */
 356 static WDML_QUEUE_STATE WDML_HandleAdviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 357 {
 358     DDEACK              ddeAck;
 359     UINT_PTR            uiLo, uiHi;
 360     HSZ                 hsz;
 361
 362     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 363     {
 364         return WDML_QS_PASS;
 365     }
 366
 367     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 368     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 369
 370     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 371         return WDML_QS_PASS;
 372
 373     GlobalDeleteAtom(uiHi);
 374     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 375
 376     WDML_ExtractAck(uiLo, &ddeAck);
 377
 378     if (ddeAck.fAck)
 379     {
 380         WDML_LINK*      pLink;
 381
 382         /* billx: first to see if the link is already created. */
 383         pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 384                               pXAct->hszItem, TRUE, pXAct->wFmt);
 385         if (pLink != NULL)
 386         {
 387             /* we found a link, and only need to modify it in case it changes */
 388             pLink->transactionType = pXAct->wType;
 389         }
 390         else
 391         {
 392             WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 393                          pXAct->wType, pXAct->hszItem, pXAct->wFmt);
 394         }
 395         pXAct->hDdeData = (HDDEDATA)1;
 396     }
 397     else
 398     {
 399         TRACE("Returning FALSE on XTYP_ADVSTART - fAck was FALSE\n");
 400         GlobalFree(pXAct->hMem);
 401         pXAct->hDdeData = NULL;
 402     }
 403
 404     return WDML_QS_HANDLED;
 405 }
 406
 407 /******************************************************************
 408  *              WDML_ClientQueueUnadvise
 409  *
 410  * queues an unadvise transaction
 411  */
 412 static WDML_XACT*       WDML_ClientQueueUnadvise(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
 413 {
 414     WDML_XACT*  pXAct;
 415     ATOM        atom;
 416
 417     TRACE("XTYP_ADVSTOP transaction\n");
 418
 419     atom = WDML_MakeAtomFromHsz(hszItem);
 420     if (!atom) return NULL;
 421
 422     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE, wFmt, hszItem);
 423     if (!pXAct)
 424     {
 425         GlobalDeleteAtom(atom);
 426         return NULL;
 427     }
 428
 429     /* end advise loop: post WM_DDE_UNADVISE to server to terminate link
 430      * on the specified item.
 431      */
 432     pXAct->lParam = PackDDElParam(WM_DDE_UNADVISE, wFmt, atom);
 433     return pXAct;
 434 }
 435
 436 /******************************************************************
 437  *              WDML_HandleUnadviseReply
 438  *
 439  *
 440  */
 441 static WDML_QUEUE_STATE WDML_HandleUnadviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 442 {
 443     DDEACK      ddeAck;
 444     UINT_PTR    uiLo, uiHi;
 445     HSZ         hsz;
 446
 447     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 448     {
 449         return WDML_QS_PASS;
 450     }
 451
 452     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 453     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 454
 455     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 456         return WDML_QS_PASS;
 457
 458     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 459     GlobalDeleteAtom(uiHi);
 460
 461     WDML_ExtractAck(uiLo, &ddeAck);
 462
 463     TRACE("WM_DDE_ACK received while waiting for a timeout\n");
 464
 465     if (!ddeAck.fAck)
 466     {
 467         TRACE("Returning FALSE on XTYP_ADVSTOP - fAck was FALSE\n");
 468         pXAct->hDdeData = NULL;
 469     }
 470     else
 471     {
 472         /* billx: remove the link */
 473         WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
 474                         pXAct->hszItem, pXAct->wFmt);
 475         pXAct->hDdeData = (HDDEDATA)1;
 476     }
 477     return WDML_QS_HANDLED;
 478 }
 479
 480 /******************************************************************
 481  *              WDML_ClientQueueRequest
 482  *
 483  *
 484  */
 485 static WDML_XACT*       WDML_ClientQueueRequest(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
 486 {
 487     WDML_XACT*  pXAct;
 488     ATOM        atom;
 489
 490     TRACE("XTYP_REQUEST transaction\n");
 491
 492     atom = WDML_MakeAtomFromHsz(hszItem);
 493     if (!atom) return NULL;
 494
 495     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST, wFmt, hszItem);
 496     if (!pXAct)
 497     {
 498         GlobalDeleteAtom(atom);
 499         return NULL;
 500     }
 501
 502     pXAct->lParam = PackDDElParam(WM_DDE_REQUEST, wFmt, atom);
 503
 504     return pXAct;
 505 }
 506
 507 /******************************************************************
 508  *              WDML_HandleRequestReply
 509  *
 510  *
 511  */
 512 static WDML_QUEUE_STATE WDML_HandleRequestReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 513 {
 514     DDEACK              ddeAck;
 515     WINE_DDEHEAD        wdh;
 516     UINT_PTR            uiLo, uiHi;
 517     HSZ                 hsz;
 518
 519     if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 520         return WDML_QS_PASS;
 521
 522     switch (msg->message)
 523     {
 524     case WM_DDE_ACK:
 525         UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 526         FreeDDElParam(WM_DDE_ACK, msg->lParam);
 527         GlobalDeleteAtom(uiHi);
 528         WDML_ExtractAck(uiLo, &ddeAck);
 529         pXAct->hDdeData = 0;
 530         if (ddeAck.fAck)
 531             ERR("Positive answer should appear in NACK for a request, assuming negative\n");
 532         TRACE("Negative answer...\n");
 533         break;
 534
 535     case WM_DDE_DATA:
 536         UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
 537         TRACE("Got the result (%08x)\n", uiLo);
 538
 539         hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 540
 541         if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 542             return WDML_QS_PASS;
 543
 544         pXAct->hDdeData = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
 545         if (wdh.fRelease)
 546         {
 547             GlobalFree((HGLOBAL)uiLo);
 548         }
 549         if (wdh.fAckReq)
 550         {
 551             WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
 552         }
 553         else
 554         {
 555             GlobalDeleteAtom(uiHi);
 556             FreeDDElParam(WM_DDE_ACK, msg->lParam);
 557         }
 558         break;
 559
 560     default:
 561         FreeDDElParam(msg->message, msg->lParam);
 562         return WDML_QS_PASS;
 563     }
 564
 565     return WDML_QS_HANDLED;
 566 }
 567
 568 /******************************************************************
 569  *              WDML_BuildExecuteCommand
 570  *
 571  * Creates a DDE block suitable for sending in WM_DDE_COMMAND
 572  * It also takes care of string conversion between the two window procedures
 573  */
 574 static  HGLOBAL WDML_BuildExecuteCommand(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
 575 {
 576     HGLOBAL     hMem;
 577     BOOL        clientUnicode, serverUnicode;
 578     DWORD       memSize;
 579
 580     clientUnicode = IsWindowUnicode(pConv->hwndClient);
 581     serverUnicode = IsWindowUnicode(pConv->hwndServer);
 582
 583     if (clientUnicode == serverUnicode)
 584     {
 585         memSize = cbData;
 586     }
 587     else
 588     {
 589         if (clientUnicode)
 590         {
 591             memSize = WideCharToMultiByte( CP_ACP, 0, pData, cbData, NULL, 0, NULL, NULL);
 592         }
 593         else
 594         {
 595             memSize = MultiByteToWideChar( CP_ACP, 0, pData, cbData, NULL, 0);
 596         }
 597     }
 598
 599     hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, memSize);
 600
 601     if (hMem)
 602     {
 603         LPBYTE  pDst;
 604
 605         pDst = GlobalLock(hMem);
 606         if (pDst)
 607         {
 608             if (clientUnicode == serverUnicode)
 609             {
 610                 memcpy(pDst, pData, cbData);
 611             }
 612             else
 613             {
 614                 if (clientUnicode)
 615                 {
 616                     WideCharToMultiByte( CP_ACP, 0, pData, cbData, pDst, memSize, NULL, NULL);
 617                 }
 618                 else
 619                 {
 620                     MultiByteToWideChar( CP_ACP, 0, pData, cbData, (LPWSTR)pDst, memSize);
 621                 }
 622             }
 623
 624             GlobalUnlock(hMem);
 625         }
 626         else
 627         {
 628             GlobalFree(hMem);
 629             hMem = 0;
 630         }
 631     }
 632     return hMem;
 633 }
 634
 635 /******************************************************************
 636  *              WDML_ClientQueueExecute
 637  *
 638  *
 639  */
 640 static WDML_XACT*       WDML_ClientQueueExecute(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
 641 {
 642     WDML_XACT*  pXAct;
 643
 644     TRACE("XTYP_EXECUTE transaction\n");
 645
 646     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
 647     if (!pXAct)
 648         return NULL;
 649
 650     if (cbData == (DWORD)-1)
 651     {
 652         HDDEDATA        hDdeData = (HDDEDATA)pData;
 653
 654         pData = DdeAccessData(hDdeData, &cbData);
 655         if (pData)
 656         {
 657             pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
 658             DdeUnaccessData(hDdeData);
 659         }
 660     }
 661     else
 662     {
 663         pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
 664     }
 665
 666     pXAct->lParam = (LPARAM)pXAct->hMem;
 667
 668     return pXAct;
 669 }
 670
 671 /******************************************************************
 672  *              WDML_HandleExecuteReply
 673  *
 674  *
 675  */
 676 static WDML_QUEUE_STATE WDML_HandleExecuteReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 677 {
 678     DDEACK      ddeAck;
 679     UINT_PTR    uiLo, uiHi;
 680
 681     if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 682     {
 683         return WDML_QS_PASS;
 684     }
 685
 686     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 687     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 688
 689     if ((HANDLE)uiHi != pXAct->hMem)
 690     {
 691         return WDML_QS_PASS;
 692     }
 693
 694     WDML_ExtractAck(uiLo, &ddeAck);
 695     pXAct->hDdeData = (HDDEDATA)(UINT_PTR)ddeAck.fAck;
 696
 697     return WDML_QS_HANDLED;
 698 }
 699
 700 /******************************************************************
 701  *              WDML_ClientQueuePoke
 702  *
 703  *
 704  */
 705 static WDML_XACT*       WDML_ClientQueuePoke(WDML_CONV* pConv, LPCVOID pData, DWORD cbData,
 706                                              UINT wFmt, HSZ hszItem)
 707 {
 708     WDML_XACT*  pXAct;
 709     ATOM        atom;
 710
 711     TRACE("XTYP_POKE transaction\n");
 712
 713     atom = WDML_MakeAtomFromHsz(hszItem);
 714     if (!atom) return NULL;
 715
 716     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE, wFmt, hszItem);
 717     if (!pXAct)
 718     {
 719         GlobalDeleteAtom(atom);
 720         return NULL;
 721     }
 722
 723     if (cbData == (DWORD)-1)
 724     {
 725         pXAct->hMem = (HDDEDATA)pData;
 726     }
 727     else
 728     {
 729         DDEPOKE*        ddePoke;
 730
 731         pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEPOKE) + cbData);
 732         ddePoke = GlobalLock(pXAct->hMem);
 733         if (ddePoke)
 734         {
 735             memcpy(ddePoke->Value, pData, cbData);
 736             ddePoke->fRelease = FALSE; /* FIXME: app owned ? */
 737             ddePoke->cfFormat = wFmt;
 738             GlobalUnlock(pXAct->hMem);
 739         }
 740     }
 741
 742     pXAct->lParam = PackDDElParam(WM_DDE_POKE, (UINT_PTR)pXAct->hMem, atom);
 743
 744     return pXAct;
 745 }
 746
 747 /******************************************************************
 748  *              WDML_HandlePokeReply
 749  *
 750  *
 751  */
 752 static WDML_QUEUE_STATE WDML_HandlePokeReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 753 {
 754     DDEACK      ddeAck;
 755     UINT_PTR    uiLo, uiHi;
 756     HSZ         hsz;
 757
 758     if (msg->message != WM_DDE_ACK && WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 759     {
 760         return WDML_QS_PASS;
 761     }
 762
 763     UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
 764     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 765     if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
 766     {
 767         return WDML_QS_PASS;
 768     }
 769     FreeDDElParam(WM_DDE_ACK, msg->lParam);
 770     GlobalDeleteAtom(uiHi);
 771
 772     WDML_ExtractAck(uiLo, &ddeAck);
 773     GlobalFree(pXAct->hMem);
 774
 775     pXAct->hDdeData = (HDDEDATA)TRUE;
 776     return TRUE;
 777 }
 778
 779 /******************************************************************
 780  *              WDML_ClientQueueTerminate
 781  *
 782  * Creates and queue an WM_DDE_TERMINATE transaction
 783  */
 784 static WDML_XACT*       WDML_ClientQueueTerminate(WDML_CONV* pConv)
 785 {
 786     WDML_XACT*          pXAct;
 787
 788     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
 789     if (!pXAct)
 790         return NULL;
 791
 792     pXAct->lParam = 0;
 793     pConv->wStatus &= ~ST_CONNECTED;
 794
 795     return pXAct;
 796 }
 797
 798 /******************************************************************
 799  *              WDML_HandleTerminateReply
 800  *
 801  * handles the reply to a terminate request
 802  */
 803 static WDML_QUEUE_STATE WDML_HandleTerminateReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct)
 804 {
 805     if (msg->message != WM_DDE_TERMINATE)
 806     {
 807         /* FIXME: should delete data passed here */
 808         return WDML_QS_SWALLOWED;
 809     }
 810
 811     if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
 812     {
 813         FIXME("hmmm shouldn't happen\n");
 814         return WDML_QS_PASS;
 815     }
 816     if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
 817     {
 818         WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
 819                             0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
 820     }
 821     WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
 822     return WDML_QS_HANDLED;
 823 }
 824
 825 /******************************************************************
 826  *              WDML_HandleReplyData
 827  *
 828  *
 829  */
 830 static WDML_QUEUE_STATE WDML_HandleIncomingData(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
 831 {
 832     UINT_PTR            uiLo, uiHi;
 833     HDDEDATA            hDdeDataIn, hDdeDataOut;
 834     WDML_LINK*          pLink;
 835     WINE_DDEHEAD        wdh;
 836     HSZ                 hsz;
 837
 838     TRACE("WM_DDE_DATA message received in the Client Proc!\n");
 839     /* wParam -- sending window handle  */
 840     /* lParam -- hDdeData & item HSZ    */
 841
 842     UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
 843     hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
 844
 845     hDdeDataIn = WDML_Global2DataHandle((HGLOBAL)uiLo, &wdh);
 846
 847     /* billx:
 848      *  For hot link, data should be passed to its callback with
 849      * XTYP_ADVDATA and callback should return the proper status.
 850      */
 851     pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE, hsz,
 852                           uiLo ? TRUE : FALSE, wdh.cfFormat);
 853     if (!pLink)
 854     {
 855         WDML_DecHSZ(pConv->instance, hsz);
 856         DdeFreeDataHandle(hDdeDataIn);
 857         return WDML_QS_PASS;
 858     }
 859
 860     if (hDdeDataIn != 0 && wdh.fAckReq)
 861     {
 862         WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
 863         if (msg->lParam)
 864             msg->lParam = 0;
 865     }
 866     else
 867     {
 868         GlobalDeleteAtom(uiHi);
 869     }
 870
 871     hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_ADVDATA, pLink->uFmt, pLink->hConv,
 872                                       pConv->hszTopic, pLink->hszItem, hDdeDataIn, 0, 0);
 873
 874     if (hDdeDataOut != (HDDEDATA)DDE_FACK || wdh.fRelease)
 875     {
 876         if (uiLo) GlobalFree((HANDLE)uiLo);
 877     }
 878
 879     DdeFreeDataHandle(hDdeDataIn);
 880
 881     WDML_DecHSZ(pConv->instance, hsz);
 882     if (msg->lParam)
 883         FreeDDElParam(WM_DDE_DATA, msg->lParam);
 884
 885     return WDML_QS_HANDLED;
 886 }
 887
 888 /******************************************************************
 889  *              WDML_HandleIncomingTerminate
 890  *
 891  *
 892  */
 893 static WDML_QUEUE_STATE WDML_HandleIncomingTerminate(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
 894 {
 895     if (pConv->hwndServer != WIN_GetFullHandle((HWND)msg->wParam))
 896         return WDML_QS_PASS;
 897
 898     pConv->wStatus |= ST_TERMINATED;
 899     if (!pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS)
 900     {
 901         WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
 902                             0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
 903     }
 904     if (pConv->wStatus & ST_CONNECTED)
 905     {
 906         /* don't care about result code (if server exists or not) */
 907         PostMessageA(pConv->hwndServer, WM_DDE_TERMINATE, (WPARAM)pConv->hwndClient, 0L);
 908         pConv->wStatus &= ~ST_CONNECTED;
 909     }
 910     /* have to keep connection around to allow reconnection */
 911     return WDML_QS_HANDLED;
 912 }
 913
 914 /******************************************************************
 915  *              WDML_HandleReply
 916  *
 917  * handles any incoming reply, and try to match to an already sent request
 918  */
 919 static WDML_QUEUE_STATE WDML_HandleReply(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
 920 {
 921     WDML_XACT*          pXAct = pConv->transactions;
 922     WDML_QUEUE_STATE    qs;
 923
 924     if (pConv->transactions)
 925     {
 926         /* first check message against a pending transaction, if any */
 927         switch (pXAct->ddeMsg)
 928         {
 929         case WM_DDE_ADVISE:
 930             qs = WDML_HandleAdviseReply(pConv, msg, pXAct);
 931             break;
 932         case WM_DDE_UNADVISE:
 933             qs = WDML_HandleUnadviseReply(pConv, msg, pXAct);
 934             break;
 935         case WM_DDE_EXECUTE:
 936             qs = WDML_HandleExecuteReply(pConv, msg, pXAct);
 937             break;
 938         case WM_DDE_REQUEST:
 939             qs = WDML_HandleRequestReply(pConv, msg, pXAct);
 940             break;
 941         case WM_DDE_POKE:
 942             qs = WDML_HandlePokeReply(pConv, msg, pXAct);
 943             break;
 944         case WM_DDE_TERMINATE:
 945             qs = WDML_HandleTerminateReply(pConv, msg, pXAct);
 946             break;
 947         default:
 948             qs = WDML_QS_ERROR;
 949             FIXME("oooch\n");
 950         }
 951     }
 952     else
 953     {
 954         qs = WDML_QS_PASS;
 955     }
 956
 957     /* now check the results */
 958     switch (qs)
 959     {
 960     case WDML_QS_ERROR:
 961     case WDML_QS_SWALLOWED:
 962         *hdd = 0;
 963         break;
 964     case WDML_QS_HANDLED:
 965         /* ok, we have resolved a pending transaction
 966          * notify callback if asynchronous, and remove it in any case
 967          */
 968         WDML_UnQueueTransaction(pConv, pXAct);
 969         if (pXAct->dwTimeout == TIMEOUT_ASYNC && pXAct->ddeMsg != WM_DDE_TERMINATE)
 970         {
 971             WDML_InvokeCallback(pConv->instance, XTYP_XACT_COMPLETE, pXAct->wFmt,
 972                                 (HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
 973                                 pXAct->hDdeData, MAKELONG(0, pXAct->xActID), 0 /* FIXME */);
 974             qs = WDML_QS_PASS;
 975         }
 976         else
 977         {
 978             *hdd = pXAct->hDdeData;
 979         }
 980         WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
 981         break;
 982     case WDML_QS_PASS:
 983         /* no pending transaction found, try a warm/hot link or a termination request */
 984         switch (msg->message)
 985         {
 986         case WM_DDE_DATA:
 987             qs = WDML_HandleIncomingData(pConv, msg, hdd);
 988             break;
 989         case WM_DDE_TERMINATE:
 990             qs = WDML_HandleIncomingTerminate(pConv, msg, hdd);
 991             break;
 992         }
 993         break;
 994     case WDML_QS_BLOCK:
 995         FIXME("shouldn't be used on client side\n");
 996         break;
 997     }
 998
 999     return qs;
1000 }
1001
1002 /******************************************************************
1003  *              WDML_SyncWaitTransactionReply
1004  *
1005  * waits until an answer for a sent request is received
1006  * time out is also handled. only used for synchronous transactions
1007  */
1008 static HDDEDATA WDML_SyncWaitTransactionReply(HCONV hConv, DWORD dwTimeout, WDML_XACT* pXAct)
1009 {
1010     DWORD       dwTime;
1011     DWORD       err;
1012     WDML_CONV*  pConv;
1013
1014     TRACE("Starting wait for a timeout of %ld ms\n", dwTimeout);
1015
1016     /* FIXME: time 32 bit wrap around */
1017     dwTimeout += GetCurrentTime();
1018
1019     while ((dwTime = GetCurrentTime()) < dwTimeout)
1020     {
1021         /* we cannot be in the crit sect all the time because when client and server run in a
1022          * single process they need to share the access to the internal data
1023          */
1024         if (MsgWaitForMultipleObjects(0, NULL, FALSE,
1025                                       dwTimeout - dwTime, QS_POSTMESSAGE) == WAIT_OBJECT_0)
1026         {
1027             BOOL        ret = FALSE;
1028             MSG         msg;
1029             WDML_CONV*  pConv;
1030             HDDEDATA    hdd;
1031
1032             EnterCriticalSection(&WDML_CritSect);
1033
1034             pConv = WDML_GetConv(hConv, FALSE);
1035             if (pConv == NULL)
1036             {
1037                 LeaveCriticalSection(&WDML_CritSect);
1038                 /* conversation no longer available... return failure */
1039                 break;
1040             }
1041             while (PeekMessageA(&msg, pConv->hwndClient, WM_DDE_FIRST, WM_DDE_LAST, PM_REMOVE))
1042             {
1043                 /* check that either pXAct has been processed or no more xActions are pending */
1044                 ret = (pConv->transactions == pXAct);
1045                 ret = WDML_HandleReply(pConv, &msg, &hdd) == WDML_QS_HANDLED &&
1046                     (pConv->transactions == NULL || ret);
1047                 if (ret) break;
1048             }
1049             LeaveCriticalSection(&WDML_CritSect);
1050             if (ret)
1051             {
1052                 return hdd;
1053             }
1054         }
1055     }
1056
1057     TRACE("Timeout !!\n");
1058
1059     EnterCriticalSection(&WDML_CritSect);
1060
1061     pConv = WDML_GetConv(hConv, FALSE);
1062     if (pConv != NULL)
1063     {
1064         if (pConv->transactions)
1065         {
1066             switch (pConv->transactions->ddeMsg)
1067             {
1068             case WM_DDE_ADVISE:         err = DMLERR_ADVACKTIMEOUT;     break;
1069             case WM_DDE_REQUEST:        err = DMLERR_DATAACKTIMEOUT;    break;
1070             case WM_DDE_EXECUTE:        err = DMLERR_EXECACKTIMEOUT;    break;
1071             case WM_DDE_POKE:           err = DMLERR_POKEACKTIMEOUT;    break;
1072             case WM_DDE_UNADVISE:       err = DMLERR_UNADVACKTIMEOUT;   break;
1073             default:                    err = DMLERR_INVALIDPARAMETER;  break;
1074             }
1075
1076             pConv->instance->lastError = err;
1077         }
1078     }
1079     LeaveCriticalSection(&WDML_CritSect);
1080
1081     return 0;
1082 }
1083
1084 /*****************************************************************
1085  *            DdeClientTransaction  (USER32.@)
1086  */
1087 HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HSZ hszItem, UINT wFmt,
1088                                      UINT wType, DWORD dwTimeout, LPDWORD pdwResult)
1089 {
1090     WDML_CONV*          pConv;
1091     WDML_XACT*          pXAct;
1092     HDDEDATA            hDdeData = 0;
1093
1094     TRACE("(%p,%ld,%p,%p,%x,%x,%ld,%p)\n",
1095           pData, cbData, hConv, hszItem, wFmt, wType, dwTimeout, pdwResult);
1096
1097     if (hConv == 0)
1098     {
1099         ERR("Invalid conversation handle\n");
1100         return 0;
1101     }
1102
1103     EnterCriticalSection(&WDML_CritSect);
1104
1105     pConv = WDML_GetConv(hConv, TRUE);
1106     if (pConv == NULL)
1107     {
1108         /* cannot set error... cannot get back to DDE instance */
1109         goto theError;
1110     }
1111
1112     switch (wType)
1113     {
1114     case XTYP_EXECUTE:
1115         if (hszItem != 0 || wFmt != 0)
1116         {
1117             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1118             goto theError;
1119         }
1120         pXAct = WDML_ClientQueueExecute(pConv, pData, cbData);
1121         break;
1122     case XTYP_POKE:
1123         pXAct = WDML_ClientQueuePoke(pConv, pData, cbData, wFmt, hszItem);
1124         break;
1125     case XTYP_ADVSTART|XTYPF_NODATA:
1126     case XTYP_ADVSTART|XTYPF_NODATA|XTYPF_ACKREQ:
1127     case XTYP_ADVSTART:
1128     case XTYP_ADVSTART|XTYPF_ACKREQ:
1129         if (pData)
1130         {
1131             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1132             goto theError;
1133         }
1134         pXAct = WDML_ClientQueueAdvise(pConv, wType, wFmt, hszItem);
1135         break;
1136     case XTYP_ADVSTOP:
1137         if (pData)
1138         {
1139             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1140             goto theError;
1141         }
1142         pXAct = WDML_ClientQueueUnadvise(pConv, wFmt, hszItem);
1143         break;
1144     case XTYP_REQUEST:
1145         if (pData)
1146         {
1147             pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1148             goto theError;
1149         }
1150         pXAct = WDML_ClientQueueRequest(pConv, wFmt, hszItem);
1151         break;
1152     default:
1153         FIXME("Unknown transation\n");
1154         /* unknown transaction type */
1155         pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
1156         goto theError;
1157     }
1158
1159     if (pXAct == NULL)
1160     {
1161         pConv->instance->lastError = DMLERR_MEMORY_ERROR;
1162         goto theError;
1163     }
1164
1165     WDML_QueueTransaction(pConv, pXAct);
1166
1167     if (!PostMessageA(pConv->hwndServer, pXAct->ddeMsg, (WPARAM)pConv->hwndClient, pXAct->lParam))
1168     {
1169         WARN("Failed posting message %x to %p (error=0x%lx)\n",
1170               pXAct->ddeMsg, pConv->hwndServer, GetLastError());
1171         pConv->wStatus &= ~ST_CONNECTED;
1172         WDML_UnQueueTransaction(pConv, pXAct);
1173         WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1174         goto theError;
1175     }
1176     pXAct->dwTimeout = dwTimeout;
1177     /* FIXME: should set the app bits on *pdwResult */
1178
1179     if (dwTimeout == TIMEOUT_ASYNC)
1180     {
1181         if (pdwResult)
1182         {
1183             *pdwResult = MAKELONG(0, pXAct->xActID);
1184         }
1185         hDdeData = (HDDEDATA)1;
1186     }
1187     else
1188     {
1189         DWORD   count, i;
1190
1191         if (pdwResult)
1192         {
1193             *pdwResult = 0L;
1194         }
1195         count = WDML_CritSect.RecursionCount;
1196         for (i = 0; i < count; i++)
1197             LeaveCriticalSection(&WDML_CritSect);
1198         hDdeData = WDML_SyncWaitTransactionReply((HCONV)pConv, dwTimeout, pXAct);
1199         for (i = 0; i < count; i++)
1200             EnterCriticalSection(&WDML_CritSect);
1201     }
1202     LeaveCriticalSection(&WDML_CritSect);
1203
1204     return hDdeData;
1205  theError:
1206     LeaveCriticalSection(&WDML_CritSect);
1207     return 0;
1208 }
1209
1210 /*****************************************************************
1211  *            DdeAbandonTransaction (USER32.@)
1212  */
1213 BOOL WINAPI DdeAbandonTransaction(DWORD idInst, HCONV hConv, DWORD idTransaction)
1214 {
1215     WDML_INSTANCE*      pInstance;
1216     WDML_CONV*          pConv;
1217     WDML_XACT*          pXAct;
1218
1219     TRACE("(%08lx,%p,%08ld);\n", idInst, hConv, idTransaction);
1220
1221     EnterCriticalSection(&WDML_CritSect);
1222     if ((pInstance = WDML_GetInstance(idInst)))
1223     {
1224         if (hConv)
1225         {
1226             if ((pConv = WDML_GetConv(hConv, TRUE)) && pConv->instance == pInstance)
1227             {
1228                 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1229                 {
1230                     if (pXAct->dwTimeout == TIMEOUT_ASYNC &&
1231                         (idTransaction == 0 || pXAct->xActID == idTransaction))
1232                     {
1233                         WDML_UnQueueTransaction(pConv, pXAct);
1234                         WDML_FreeTransaction(pInstance, pXAct, TRUE);
1235                     }
1236                 }
1237             }
1238         }
1239         else
1240         {
1241             for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv; pConv = pConv->next)
1242             {
1243                 if (!(pConv->wStatus & ST_CONNECTED)) continue;
1244                 for (pXAct = pConv->transactions; pXAct; pXAct = pXAct->next)
1245                 {
1246                     if (pXAct->dwTimeout == TIMEOUT_ASYNC)
1247                     {
1248                         WDML_UnQueueTransaction(pConv, pXAct);
1249                         WDML_FreeTransaction(pInstance, pXAct, TRUE);
1250                     }
1251                 }
1252             }
1253         }
1254     }
1255     LeaveCriticalSection(&WDML_CritSect);
1256
1257     return TRUE;
1258 }
1259
1260 /******************************************************************
1261  *              WDML_ClientProc
1262  *
1263  * Window Proc created on client side for each conversation
1264  */
1265 static LRESULT CALLBACK WDML_ClientProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
1266 {
1267     UINT        uiLo, uiHi;
1268     WDML_CONV*  pConv = NULL;
1269     HSZ         hszSrv, hszTpc;
1270
1271     if (iMsg == WM_DDE_ACK &&
1272         /* in the initial WM_INITIATE sendmessage */
1273         ((pConv = WDML_GetConvFromWnd(hwnd)) == NULL || pConv->wStatus == XST_INIT1))
1274     {
1275         /* In response to WM_DDE_INITIATE, save server window  */
1276         char            buf[256];
1277         WDML_INSTANCE*  pInstance;
1278
1279         /* note: sent messages do not need packing */
1280         uiLo = LOWORD(lParam);
1281         uiHi = HIWORD(lParam);
1282
1283         /* FIXME: convlist should be handled here */
1284         if (pConv)
1285         {
1286             /* we already have started the conv with a server, drop other replies */
1287             GlobalDeleteAtom(uiLo);
1288             GlobalDeleteAtom(uiHi);
1289             PostMessageA((HWND)wParam, WM_DDE_TERMINATE, (WPARAM)hwnd, 0);
1290             return 0;
1291         }
1292
1293         pInstance = WDML_GetInstanceFromWnd(hwnd);
1294
1295         hszSrv = WDML_MakeHszFromAtom(pInstance, uiLo);
1296         hszTpc = WDML_MakeHszFromAtom(pInstance, uiHi);
1297
1298         pConv = WDML_AddConv(pInstance, WDML_CLIENT_SIDE, hszSrv, hszTpc, hwnd, (HWND)wParam);
1299
1300         SetWindowLongA(hwnd, GWL_WDML_CONVERSATION, (DWORD)pConv);
1301         pConv->wStatus |= ST_CONNECTED;
1302         pConv->wConvst = XST_INIT1;
1303
1304         /* check if server is handled by DDEML */
1305         if ((GetClassNameA((HWND)wParam, buf, sizeof(buf)) &&
1306              strcmp(buf, WDML_szServerConvClassA) == 0) ||
1307             (GetClassNameW((HWND)wParam, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
1308              lstrcmpW((LPWSTR)buf, WDML_szServerConvClassW) == 0))
1309         {
1310             pConv->wStatus |= ST_ISLOCAL;
1311         }
1312
1313         WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_CONNECT_CONFIRM, (WPARAM)hwnd, wParam);
1314
1315         GlobalDeleteAtom(uiLo);
1316         GlobalDeleteAtom(uiHi);
1317
1318         /* accept conversation */
1319         return 1;
1320     }
1321
1322     if (iMsg >= WM_DDE_FIRST && iMsg <= WM_DDE_LAST)
1323     {
1324         EnterCriticalSection(&WDML_CritSect);
1325
1326         pConv = WDML_GetConvFromWnd(hwnd);
1327
1328         if (pConv)
1329         {
1330             MSG         msg;
1331             HDDEDATA    hdd;
1332
1333             msg.hwnd = hwnd;
1334             msg.message = iMsg;
1335             msg.wParam = wParam;
1336             msg.lParam = lParam;
1337
1338             WDML_HandleReply(pConv, &msg, &hdd);
1339         }
1340
1341         LeaveCriticalSection(&WDML_CritSect);
1342         return 0;
1343     }
1344
1345     return (IsWindowUnicode(hwnd)) ?
1346         DefWindowProcA(hwnd, iMsg, wParam, lParam) : DefWindowProcW(hwnd, iMsg, wParam, lParam);
1347 }
1348
1349 /*****************************************************************
1350  *            DdeDisconnect   (USER32.@)
1351  */
1352 BOOL WINAPI DdeDisconnect(HCONV hConv)
1353 {
1354     WDML_CONV*  pConv = NULL;
1355     WDML_XACT*  pXAct;
1356     DWORD       count, i;
1357     BOOL        ret = FALSE;
1358
1359     TRACE("(%p)\n", hConv);
1360
1361     if (hConv == 0)
1362     {
1363         ERR("DdeDisconnect(): hConv = 0\n");
1364         return FALSE;
1365     }
1366
1367     EnterCriticalSection(&WDML_CritSect);
1368     pConv = WDML_GetConv(hConv, TRUE);
1369     if (pConv != NULL)
1370     {
1371         if (pConv->wStatus & ST_CLIENT)
1372         {
1373             /* FIXME: should abandon all pending transactions */
1374             pXAct = WDML_ClientQueueTerminate(pConv);
1375             if (pXAct != NULL)
1376             {
1377                 count = WDML_CritSect.RecursionCount;
1378                 for (i = 0; i < count; i++)
1379                     LeaveCriticalSection(&WDML_CritSect);
1380                 if (PostMessageA(pConv->hwndServer, pXAct->ddeMsg,
1381                                  (WPARAM)pConv->hwndClient, pXAct->lParam))
1382                     WDML_SyncWaitTransactionReply(hConv, 10000, pXAct);
1383                 for (i = 0; i < count; i++)
1384                     EnterCriticalSection(&WDML_CritSect);
1385                 ret = TRUE;
1386                 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
1387                 /* still have to destroy data assosiated with conversation */
1388                 WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
1389             }
1390             else
1391             {
1392                 FIXME("Not implemented yet for a server side conversation\n");
1393             }
1394         }
1395     }
1396     LeaveCriticalSection(&WDML_CritSect);
1397
1398     return ret;
1399 }
1400
1401 /*****************************************************************
1402  *            DdeImpersonateClient (USER32.@)
1403  */
1404 BOOL WINAPI DdeImpersonateClient(HCONV hConv)
1405 {
1406     WDML_CONV*  pConv;
1407     BOOL        ret = FALSE;
1408
1409     TRACE("(%p)\n", hConv);
1410
1411     EnterCriticalSection(&WDML_CritSect);
1412     pConv = WDML_GetConv(hConv, TRUE);
1413     if (pConv)
1414     {
1415         ret = ImpersonateDdeClientWindow(pConv->hwndClient, pConv->hwndServer);
1416     }
1417     LeaveCriticalSection(&WDML_CritSect);
1418     return ret;
1419 }