git.oblomov.eu Git - wine/blob - dlls/shell32/shell.c

   1 /*
   2  *                              Shell Library Functions
   3  *
   4  *  1998 Marcus Meissner
   5  */
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9 #include <ctype.h>
  10 #include "windef.h"
  11 #include "wingdi.h"
  12 #include "wine/winuser16.h"
  13 #include "wine/winbase16.h"
  14 #include "wine/shell16.h"
  15 #include "winerror.h"
  16 #include "heap.h"
  17 #include "ldt.h"
  18 #include "module.h"
  19 #include "neexe.h"
  20 #include "dlgs.h"
  21 #include "cursoricon.h"
  22 #include "shellapi.h"
  23 #include "shlobj.h"
  24 #include "debugtools.h"
  25 #include "winreg.h"
  26 #include "syslevel.h"
  27 #include "shlwapi.h"
  28
  29 DEFAULT_DEBUG_CHANNEL(shell);
  30 DECLARE_DEBUG_CHANNEL(exec);
  31
  32 /* .ICO file ICONDIR definitions */
  33
  34 #include "pshpack1.h"
  35
  36 typedef struct
  37 {
  38     BYTE        bWidth;          /* Width, in pixels, of the image      */
  39     BYTE        bHeight;         /* Height, in pixels, of the image     */
  40     BYTE        bColorCount;     /* Number of colors in image (0 if >=8bpp) */
  41     BYTE        bReserved;       /* Reserved ( must be 0)               */
  42     WORD        wPlanes;         /* Color Planes                        */
  43     WORD        wBitCount;       /* Bits per pixel                      */
  44     DWORD       dwBytesInRes;    /* How many bytes in this resource?    */
  45     DWORD       dwImageOffset;   /* Where in the file is this image?    */
  46 } icoICONDIRENTRY, *LPicoICONDIRENTRY;
  47
  48 typedef struct
  49 {
  50     WORD            idReserved;   /* Reserved (must be 0)               */
  51     WORD            idType;       /* Resource Type (1 for icons)        */
  52     WORD            idCount;      /* How many images?                   */
  53     icoICONDIRENTRY idEntries[1]; /* An entry for each image (idCount of 'em) */
  54 } icoICONDIR, *LPicoICONDIR;
  55
  56 #include "poppack.h"
  57
  58 static const char*      lpstrMsgWndCreated = "OTHERWINDOWCREATED";
  59 static const char*      lpstrMsgWndDestroyed = "OTHERWINDOWDESTROYED";
  60 static const char*      lpstrMsgShellActivate = "ACTIVATESHELLWINDOW";
  61
  62 static HWND16   SHELL_hWnd = 0;
  63 static HHOOK    SHELL_hHook = 0;
  64 static UINT16   uMsgWndCreated = 0;
  65 static UINT16   uMsgWndDestroyed = 0;
  66 static UINT16   uMsgShellActivate = 0;
  67 HINSTANCE16     SHELL_hInstance = 0;
  68 HINSTANCE SHELL_hInstance32;
  69 static int SHELL_Attach = 0;
  70
  71 /***********************************************************************
  72  * SHELL_DllEntryPoint [SHELL.entry]
  73  *
  74  * Initialization code for shell.dll. Automatically loads the
  75  * 32-bit shell32.dll to allow thunking up to 32-bit code.
  76  *
  77  * RETURNS:
  78  */
  79 BOOL WINAPI SHELL_DllEntryPoint(DWORD Reason, HINSTANCE16 hInst,
  80                                 WORD ds, WORD HeapSize, DWORD res1, WORD res2)
  81 {
  82     TRACE("(%08lx, %04x, %04x, %04x, %08lx, %04x)\n",
  83           Reason, hInst, ds, HeapSize, res1, res2);
  84
  85     switch(Reason)
  86     {
  87     case DLL_PROCESS_ATTACH:
  88         SHELL_Attach++;
  89         if (SHELL_hInstance)
  90         {
  91             ERR("shell.dll instantiated twice!\n");
  92             /*
  93              * We should return FALSE here, but that will break
  94              * most apps that use CreateProcess because we do
  95              * not yet support seperate address-spaces.
  96              */
  97             return TRUE;
  98         }
  99
 100         SHELL_hInstance = hInst;
 101         if(!SHELL_hInstance32)
 102         {
 103             if(!(SHELL_hInstance32 = LoadLibraryA("shell32.dll")))
 104             {
 105                 ERR("Could not load sibling shell32.dll\n");
 106                 return FALSE;
 107             }
 108         }
 109         break;
 110
 111     case DLL_PROCESS_DETACH:
 112         if(!--SHELL_Attach)
 113         {
 114             SHELL_hInstance = 0;
 115             if(SHELL_hInstance32)
 116                 FreeLibrary(SHELL_hInstance32);
 117         }
 118         break;
 119     }
 120     return TRUE;
 121 }
 122
 123 /*************************************************************************
 124  *                              DragAcceptFiles16               [SHELL.9]
 125  */
 126 void WINAPI DragAcceptFiles16(HWND16 hWnd, BOOL16 b)
 127 {
 128   DragAcceptFiles(hWnd, b);
 129 }
 130
 131 /*************************************************************************
 132  *                              DragQueryFile16         [SHELL.11]
 133  */
 134 UINT16 WINAPI DragQueryFile16(
 135         HDROP16 hDrop,
 136         WORD wFile,
 137         LPSTR lpszFile,
 138         WORD wLength)
 139 {
 140         LPSTR lpDrop;
 141         UINT i = 0;
 142         LPDROPFILESTRUCT16 lpDropFileStruct = (LPDROPFILESTRUCT16) GlobalLock16(hDrop);
 143
 144         TRACE("(%04x, %x, %p, %u)\n", hDrop,wFile,lpszFile,wLength);
 145
 146         if(!lpDropFileStruct) goto end;
 147
 148         lpDrop = (LPSTR) lpDropFileStruct + lpDropFileStruct->wSize;
 149         wFile = (wFile==0xffff) ? 0xffffffff : wFile;
 150
 151         while (i++ < wFile)
 152         {
 153           while (*lpDrop++); /* skip filename */
 154           if (!*lpDrop)
 155           {
 156             i = (wFile == 0xFFFFFFFF) ? i : 0;
 157             goto end;
 158           }
 159         }
 160
 161         i = strlen(lpDrop);
 162         i++;
 163         if (!lpszFile ) goto end;   /* needed buffer size */
 164         i = (wLength > i) ? i : wLength;
 165         lstrcpynA (lpszFile,  lpDrop,  i);
 166 end:
 167         GlobalUnlock16(hDrop);
 168         return i;
 169 }
 170
 171 /*************************************************************************
 172  *                              DragFinish16            [SHELL.12]
 173  */
 174 void WINAPI DragFinish16(HDROP16 h)
 175 {
 176     TRACE("\n");
 177     GlobalFree16((HGLOBAL16)h);
 178 }
 179
 180
 181 /*************************************************************************
 182  *                              DragQueryPoint16                [SHELL.13]
 183  */
 184 BOOL16 WINAPI DragQueryPoint16(HDROP16 hDrop, POINT16 *p)
 185 {
 186   LPDROPFILESTRUCT16 lpDropFileStruct;
 187   BOOL16           bRet;
 188   TRACE("\n");
 189   lpDropFileStruct = (LPDROPFILESTRUCT16) GlobalLock16(hDrop);
 190
 191   memcpy(p,&lpDropFileStruct->ptMousePos,sizeof(POINT16));
 192   bRet = lpDropFileStruct->fInNonClientArea;
 193
 194   GlobalUnlock16(hDrop);
 195   return bRet;
 196 }
 197
 198 /*************************************************************************
 199  *      SHELL_FindExecutable [Internal]
 200  *
 201  * Utility for code sharing between FindExecutable and ShellExecute
 202  */
 203 HINSTANCE SHELL_FindExecutable( LPCSTR lpFile,
 204                                          LPCSTR lpOperation,
 205                                          LPSTR lpResult)
 206 { char *extension = NULL; /* pointer to file extension */
 207     char tmpext[5];         /* local copy to mung as we please */
 208     char filetype[256];     /* registry name for this filetype */
 209     LONG filetypelen=256;   /* length of above */
 210     char command[256];      /* command from registry */
 211     LONG commandlen=256;    /* This is the most DOS can handle :) */
 212     char buffer[256];       /* Used to GetProfileString */
 213     HINSTANCE retval=31;  /* default - 'No association was found' */
 214     char *tok;              /* token pointer */
 215     int i;                  /* random counter */
 216     char xlpFile[256] = ""; /* result of SearchPath */
 217
 218   TRACE("%s\n", (lpFile != NULL?lpFile:"-") );
 219
 220     lpResult[0]='\0'; /* Start off with an empty return string */
 221
 222     /* trap NULL parameters on entry */
 223     if (( lpFile == NULL ) || ( lpResult == NULL ) || ( lpOperation == NULL ))
 224   { WARN_(exec)("(lpFile=%s,lpResult=%s,lpOperation=%s): NULL parameter\n",
 225            lpFile, lpOperation, lpResult);
 226         return 2; /* File not found. Close enough, I guess. */
 227     }
 228
 229     if (SearchPathA( NULL, lpFile,".exe",sizeof(xlpFile),xlpFile,NULL))
 230   { TRACE("SearchPathA returned non-zero\n");
 231         lpFile = xlpFile;
 232     }
 233
 234     /* First thing we need is the file's extension */
 235     extension = strrchr( xlpFile, '.' ); /* Assume last "." is the one; */
 236                                         /* File->Run in progman uses */
 237                                         /* .\FILE.EXE :( */
 238   TRACE("xlpFile=%s,extension=%s\n", xlpFile, extension);
 239
 240     if ((extension == NULL) || (extension == &xlpFile[strlen(xlpFile)]))
 241   { WARN("Returning 31 - No association\n");
 242         return 31; /* no association */
 243     }
 244
 245     /* Make local copy & lowercase it for reg & 'programs=' lookup */
 246     lstrcpynA( tmpext, extension, 5 );
 247     CharLowerA( tmpext );
 248   TRACE("%s file\n", tmpext);
 249
 250     /* Three places to check: */
 251     /* 1. win.ini, [windows], programs (NB no leading '.') */
 252     /* 2. Registry, HKEY_CLASS_ROOT\<filetype>\shell\open\command */
 253     /* 3. win.ini, [extensions], extension (NB no leading '.' */
 254     /* All I know of the order is that registry is checked before */
 255     /* extensions; however, it'd make sense to check the programs */
 256     /* section first, so that's what happens here. */
 257
 258     /* See if it's a program - if GetProfileString fails, we skip this
 259      * section. Actually, if GetProfileString fails, we've probably
 260      * got a lot more to worry about than running a program... */
 261     if ( GetProfileStringA("windows", "programs", "exe pif bat com",
 262                                                   buffer, sizeof(buffer)) > 0 )
 263   { for (i=0;i<strlen(buffer); i++) buffer[i]=tolower(buffer[i]);
 264
 265                 tok = strtok(buffer, " \t"); /* ? */
 266                 while( tok!= NULL)
 267                   {
 268                         if (strcmp(tok, &tmpext[1])==0) /* have to skip the leading "." */
 269                           {
 270                                 strcpy(lpResult, xlpFile);
 271                                 /* Need to perhaps check that the file has a path
 272                                  * attached */
 273         TRACE("found %s\n", lpResult);
 274         return 33;
 275
 276                 /* Greater than 32 to indicate success FIXME According to the
 277                  * docs, I should be returning a handle for the
 278                  * executable. Does this mean I'm supposed to open the
 279                  * executable file or something? More RTFM, I guess... */
 280                           }
 281                         tok=strtok(NULL, " \t");
 282                   }
 283           }
 284
 285     /* Check registry */
 286     if (RegQueryValue16( HKEY_CLASSES_ROOT, tmpext, filetype,
 287                          &filetypelen ) == ERROR_SUCCESS )
 288     {
 289         filetype[filetypelen]='\0';
 290         TRACE("File type: %s\n", filetype);
 291
 292         /* Looking for ...buffer\shell\lpOperation\command */
 293         strcat( filetype, "\\shell\\" );
 294         strcat( filetype, lpOperation );
 295         strcat( filetype, "\\command" );
 296
 297         if (RegQueryValue16( HKEY_CLASSES_ROOT, filetype, command,
 298                              &commandlen ) == ERROR_SUCCESS )
 299         {
 300             LPSTR tmp;
 301             char param[256];
 302             LONG paramlen = 256;
 303
 304
 305             /* Get the parameters needed by the application
 306                from the associated ddeexec key */
 307             tmp = strstr(filetype,"command");
 308             tmp[0] = '\0';
 309             strcat(filetype,"ddeexec");
 310
 311             if(RegQueryValue16( HKEY_CLASSES_ROOT, filetype, param,&paramlen ) == ERROR_SUCCESS)
 312             {
 313               strcat(command," ");
 314               strcat(command,param);
 315               commandlen += paramlen;
 316             }
 317
 318             /* Is there a replace() function anywhere? */
 319             command[commandlen]='\0';
 320             strcpy( lpResult, command );
 321             tok=strstr( lpResult, "%1" );
 322             if (tok != NULL)
 323             {
 324                 tok[0]='\0'; /* truncate string at the percent */
 325                 strcat( lpResult, xlpFile ); /* what if no dir in xlpFile? */
 326                 tok=strstr( command, "%1" );
 327                 if ((tok!=NULL) && (strlen(tok)>2))
 328                 {
 329                     strcat( lpResult, &tok[2] );
 330                 }
 331             }
 332             retval=33; /* FIXME see above */
 333         }
 334     }
 335     else /* Check win.ini */
 336     {
 337         /* Toss the leading dot */
 338         extension++;
 339         if ( GetProfileStringA( "extensions", extension, "", command,
 340                                   sizeof(command)) > 0)
 341           {
 342                 if (strlen(command)!=0)
 343                   {
 344                         strcpy( lpResult, command );
 345                         tok=strstr( lpResult, "^" ); /* should be ^.extension? */
 346                         if (tok != NULL)
 347                           {
 348                                 tok[0]='\0';
 349                                 strcat( lpResult, xlpFile ); /* what if no dir in xlpFile? */
 350                                 tok=strstr( command, "^" ); /* see above */
 351                                 if ((tok != NULL) && (strlen(tok)>5))
 352                                   {
 353                                         strcat( lpResult, &tok[5]);
 354                                   }
 355                           }
 356                         retval=33; /* FIXME - see above */
 357                   }
 358           }
 359         }
 360
 361     TRACE("returning %s\n", lpResult);
 362     return retval;
 363 }
 364
 365 /*************************************************************************
 366  *                              ShellExecute16          [SHELL.20]
 367  */
 368 HINSTANCE16 WINAPI ShellExecute16( HWND16 hWnd, LPCSTR lpOperation,
 369                                    LPCSTR lpFile, LPCSTR lpParameters,
 370                                    LPCSTR lpDirectory, INT16 iShowCmd )
 371 {   HINSTANCE16 retval=31;
 372     char old_dir[1024];
 373     char cmd[1024] = "";
 374
 375     TRACE("(%04x,'%s','%s','%s','%s',%x)\n",
 376                 hWnd, lpOperation ? lpOperation:"<null>", lpFile ? lpFile:"<null>",
 377                 lpParameters ? lpParameters : "<null>",
 378                 lpDirectory ? lpDirectory : "<null>", iShowCmd);
 379
 380     if (lpFile==NULL) return 0; /* should not happen */
 381     if (lpOperation==NULL) /* default is open */
 382       lpOperation="open";
 383
 384     if (lpDirectory)
 385     { GetCurrentDirectoryA( sizeof(old_dir), old_dir );
 386         SetCurrentDirectoryA( lpDirectory );
 387     }
 388
 389     /* First try to execute lpFile with lpParameters directly */
 390     strcpy(cmd,lpFile);
 391     strcat(cmd,lpParameters ? lpParameters : "");
 392
 393     retval = WinExec16( cmd, iShowCmd );
 394
 395     /* Unable to execute lpFile directly
 396        Check if we can match an application to lpFile */
 397     if(retval < 32)
 398     {
 399       cmd[0] = '\0';
 400       retval = SHELL_FindExecutable( lpFile, lpOperation, cmd );
 401
 402       if (retval > 32)  /* Found */
 403       {
 404         if (lpParameters)
 405         {
 406             strcat(cmd," ");
 407             strcat(cmd,lpParameters);
 408         }
 409         retval = WinExec16( cmd, iShowCmd );
 410       }
 411       else if(PathIsURLA((LPSTR)lpFile))    /* File not found, check for URL */
 412       {
 413         char lpstrProtocol[256];
 414         LONG cmdlen = 512;
 415         LPSTR lpstrRes;
 416         INT iSize;
 417
 418         lpstrRes = strchr(lpFile,':');
 419         iSize = lpstrRes - lpFile;
 420
 421         /* Looking for ...protocol\shell\lpOperation\command */
 422         strncpy(lpstrProtocol,lpFile,iSize);
 423         lpstrProtocol[iSize]='\0';
 424         strcat( lpstrProtocol, "\\shell\\" );
 425         strcat( lpstrProtocol, lpOperation );
 426         strcat( lpstrProtocol, "\\command" );
 427
 428         /* Remove File Protocol from lpFile */
 429         /* In the case file://path/file     */
 430         if(!strncasecmp(lpFile,"file",iSize))
 431         {
 432           lpFile += iSize;
 433           while(*lpFile == ':') lpFile++;
 434         }
 435
 436
 437         /* Get the application for the protocol and execute it */
 438         if (RegQueryValue16( HKEY_CLASSES_ROOT, lpstrProtocol, cmd,
 439                              &cmdlen ) == ERROR_SUCCESS )
 440         {
 441             LPSTR tok;
 442             LPSTR tmp;
 443             char param[256] = "";
 444             LONG paramlen = 256;
 445
 446             /* Get the parameters needed by the application
 447                from the associated ddeexec key */
 448             tmp = strstr(lpstrProtocol,"command");
 449             tmp[0] = '\0';
 450             strcat(lpstrProtocol,"ddeexec");
 451
 452             if(RegQueryValue16( HKEY_CLASSES_ROOT, lpstrProtocol, param,&paramlen ) == ERROR_SUCCESS)
 453             {
 454               strcat(cmd," ");
 455               strcat(cmd,param);
 456               cmdlen += paramlen;
 457             }
 458
 459             /* Is there a replace() function anywhere? */
 460             cmd[cmdlen]='\0';
 461
 462             tok=strstr( cmd, "%1" );
 463             if (tok != NULL)
 464             {
 465                 tok[0]='\0'; /* truncate string at the percent */
 466                 strcat( cmd, lpFile ); /* what if no dir in xlpFile? */
 467                 tok=strstr( cmd, "%1" );
 468                 if ((tok!=NULL) && (strlen(tok)>2))
 469                 {
 470                     strcat( cmd, &tok[2] );
 471                 }
 472             }
 473
 474             retval = WinExec16( cmd, iShowCmd );
 475         }
 476       }
 477     /* Check if file specified is in the form www.??????.*** */
 478       else if(!strncasecmp(lpFile,"www",3))
 479       {
 480         /* if so, append lpFile http:// and call ShellExecute */
 481         char lpstrTmpFile[256] = "http://" ;
 482         strcat(lpstrTmpFile,lpFile);
 483         retval = ShellExecuteA(hWnd,lpOperation,lpstrTmpFile,NULL,NULL,0);
 484       }
 485     }
 486     if (lpDirectory)
 487       SetCurrentDirectoryA( old_dir );
 488     return retval;
 489 }
 490
 491 /*************************************************************************
 492  *             FindExecutable16   (SHELL.21)
 493  */
 494 HINSTANCE16 WINAPI FindExecutable16( LPCSTR lpFile, LPCSTR lpDirectory,
 495                                      LPSTR lpResult )
 496 { return (HINSTANCE16)FindExecutableA( lpFile, lpDirectory, lpResult );
 497 }
 498
 499
 500 /*************************************************************************
 501  *             AboutDlgProc16   (SHELL.33)
 502  */
 503 BOOL16 WINAPI AboutDlgProc16( HWND16 hWnd, UINT16 msg, WPARAM16 wParam,
 504                                LPARAM lParam )
 505 { return AboutDlgProc( hWnd, msg, wParam, lParam );
 506 }
 507
 508
 509 /*************************************************************************
 510  *             ShellAbout16   (SHELL.22)
 511  */
 512 BOOL16 WINAPI ShellAbout16( HWND16 hWnd, LPCSTR szApp, LPCSTR szOtherStuff,
 513                             HICON16 hIcon )
 514 { return ShellAboutA( hWnd, szApp, szOtherStuff, hIcon );
 515 }
 516
 517 /*************************************************************************
 518  *                              SHELL_GetResourceTable
 519  */
 520 static DWORD SHELL_GetResourceTable(HFILE hFile,LPBYTE *retptr)
 521 {       IMAGE_DOS_HEADER        mz_header;
 522         char                    magic[4];
 523         int                     size;
 524
 525         TRACE("\n");
 526
 527         *retptr = NULL;
 528         _llseek( hFile, 0, SEEK_SET );
 529         if ((_lread(hFile,&mz_header,sizeof(mz_header)) != sizeof(mz_header)) || (mz_header.e_magic != IMAGE_DOS_SIGNATURE))
 530         { /* .ICO file ? */
 531           if (mz_header.e_cblp == 1)
 532           { /* ICONHEADER.idType, must be 1 */
 533             *retptr = (LPBYTE)-1;
 534             return 1;
 535           }
 536           else
 537             return 0; /* failed */
 538         }
 539         _llseek( hFile, mz_header.e_lfanew, SEEK_SET );
 540
 541         if (_lread( hFile, magic, sizeof(magic) ) != sizeof(magic))
 542           return 0;
 543
 544         _llseek( hFile, mz_header.e_lfanew, SEEK_SET);
 545
 546         if (*(DWORD*)magic  == IMAGE_NT_SIGNATURE)
 547           return IMAGE_NT_SIGNATURE;
 548
 549         if (*(WORD*)magic == IMAGE_OS2_SIGNATURE)
 550         { IMAGE_OS2_HEADER      ne_header;
 551           LPBYTE                pTypeInfo = (LPBYTE)-1;
 552
 553           if (_lread(hFile,&ne_header,sizeof(ne_header))!=sizeof(ne_header))
 554             return 0;
 555
 556           if (ne_header.ne_magic != IMAGE_OS2_SIGNATURE)
 557             return 0;
 558
 559           size = ne_header.ne_restab - ne_header.ne_rsrctab;
 560
 561           if( size > sizeof(NE_TYPEINFO) )
 562           { pTypeInfo = (BYTE*)HeapAlloc( GetProcessHeap(), 0, size);
 563             if( pTypeInfo )
 564             { _llseek(hFile, mz_header.e_lfanew+ne_header.ne_rsrctab, SEEK_SET);
 565               if( _lread( hFile, (char*)pTypeInfo, size) != size )
 566               { HeapFree( GetProcessHeap(), 0, pTypeInfo);
 567                 pTypeInfo = NULL;
 568               }
 569             }
 570           }
 571           *retptr = pTypeInfo;
 572           return IMAGE_OS2_SIGNATURE;
 573         }
 574         return 0; /* failed */
 575 }
 576
 577 /*************************************************************************
 578  *                      SHELL_LoadResource
 579  */
 580 static HGLOBAL16 SHELL_LoadResource(HINSTANCE16 hInst, HFILE hFile, NE_NAMEINFO* pNInfo, WORD sizeShift)
 581 {       BYTE*  ptr;
 582         HGLOBAL16 handle = DirectResAlloc16( hInst, 0x10, (DWORD)pNInfo->length << sizeShift);
 583
 584         TRACE("\n");
 585
 586         if( (ptr = (BYTE*)GlobalLock16( handle )) )
 587         { _llseek( hFile, (DWORD)pNInfo->offset << sizeShift, SEEK_SET);
 588           _lread( hFile, (char*)ptr, pNInfo->length << sizeShift);
 589           return handle;
 590         }
 591         return 0;
 592 }
 593
 594 /*************************************************************************
 595  *                      ICO_LoadIcon
 596  */
 597 static HGLOBAL16 ICO_LoadIcon(HINSTANCE16 hInst, HFILE hFile, LPicoICONDIRENTRY lpiIDE)
 598 {       BYTE*  ptr;
 599         HGLOBAL16 handle = DirectResAlloc16( hInst, 0x10, lpiIDE->dwBytesInRes);
 600         TRACE("\n");
 601         if( (ptr = (BYTE*)GlobalLock16( handle )) )
 602         { _llseek( hFile, lpiIDE->dwImageOffset, SEEK_SET);
 603           _lread( hFile, (char*)ptr, lpiIDE->dwBytesInRes);
 604           return handle;
 605         }
 606         return 0;
 607 }
 608
 609 /*************************************************************************
 610  *                      ICO_GetIconDirectory
 611  *
 612  *  Read .ico file and build phony ICONDIR struct for GetIconID
 613  */
 614 static HGLOBAL16 ICO_GetIconDirectory(HINSTANCE16 hInst, HFILE hFile, LPicoICONDIR* lplpiID )
 615 { WORD    id[3];  /* idReserved, idType, idCount */
 616   LPicoICONDIR  lpiID;
 617   int           i;
 618
 619   TRACE("\n");
 620   _llseek( hFile, 0, SEEK_SET );
 621   if( _lread(hFile,(char*)id,sizeof(id)) != sizeof(id) ) return 0;
 622
 623   /* check .ICO header
 624    *
 625    * - see http://www.microsoft.com/win32dev/ui/icons.htm
 626    */
 627
 628   if( id[0] || id[1] != 1 || !id[2] ) return 0;
 629
 630   i = id[2]*sizeof(icoICONDIRENTRY) ;
 631
 632   lpiID = (LPicoICONDIR)HeapAlloc( GetProcessHeap(), 0, i + sizeof(id));
 633
 634   if( _lread(hFile,(char*)lpiID->idEntries,i) == i )
 635   { HGLOBAL16 handle = DirectResAlloc16( hInst, 0x10,
 636                                      id[2]*sizeof(CURSORICONDIRENTRY) + sizeof(id) );
 637      if( handle )
 638     { CURSORICONDIR*     lpID = (CURSORICONDIR*)GlobalLock16( handle );
 639        lpID->idReserved = lpiID->idReserved = id[0];
 640        lpID->idType = lpiID->idType = id[1];
 641        lpID->idCount = lpiID->idCount = id[2];
 642        for( i=0; i < lpiID->idCount; i++ )
 643       { memcpy((void*)(lpID->idEntries + i),
 644                    (void*)(lpiID->idEntries + i), sizeof(CURSORICONDIRENTRY) - 2);
 645             lpID->idEntries[i].wResId = i;
 646          }
 647       *lplpiID = lpiID;
 648        return handle;
 649      }
 650   }
 651   /* fail */
 652
 653   HeapFree( GetProcessHeap(), 0, lpiID);
 654   return 0;
 655 }
 656
 657 /*************************************************************************
 658  *                      InternalExtractIcon             [SHELL.39]
 659  *
 660  * This abortion is called directly by Progman
 661  */
 662 HGLOBAL16 WINAPI InternalExtractIcon16(HINSTANCE16 hInstance,
 663                                      LPCSTR lpszExeFileName, UINT16 nIconIndex, WORD n )
 664 {       HGLOBAL16       hRet = 0;
 665         HGLOBAL16*      RetPtr = NULL;
 666         LPBYTE          pData;
 667         OFSTRUCT        ofs;
 668         DWORD           sig;
 669         HFILE           hFile = OpenFile( lpszExeFileName, &ofs, OF_READ );
 670         UINT16          iconDirCount = 0,iconCount = 0;
 671         LPBYTE          peimage;
 672         HANDLE  fmapping;
 673
 674         TRACE("(%04x,file %s,start %d,extract %d\n",
 675                        hInstance, lpszExeFileName, nIconIndex, n);
 676
 677         if( hFile == HFILE_ERROR || !n )
 678           return 0;
 679
 680         hRet = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, sizeof(HICON16)*n);
 681         RetPtr = (HICON16*)GlobalLock16(hRet);
 682
 683         *RetPtr = (n == 0xFFFF)? 0: 1;  /* error return values */
 684
 685         sig = SHELL_GetResourceTable(hFile,&pData);
 686
 687         if( sig==IMAGE_OS2_SIGNATURE || sig==1 ) /* .ICO file */
 688         { HICON16        hIcon = 0;
 689           NE_TYPEINFO* pTInfo = (NE_TYPEINFO*)(pData + 2);
 690           NE_NAMEINFO* pIconStorage = NULL;
 691           NE_NAMEINFO* pIconDir = NULL;
 692           LPicoICONDIR lpiID = NULL;
 693
 694           if( pData == (BYTE*)-1 )
 695           { hIcon = ICO_GetIconDirectory(hInstance, hFile, &lpiID);     /* check for .ICO file */
 696             if( hIcon )
 697             { iconDirCount = 1; iconCount = lpiID->idCount;
 698             }
 699           }
 700           else while( pTInfo->type_id && !(pIconStorage && pIconDir) )
 701           { if( pTInfo->type_id == NE_RSCTYPE_GROUP_ICON )      /* find icon directory and icon repository */
 702             { iconDirCount = pTInfo->count;
 703               pIconDir = ((NE_NAMEINFO*)(pTInfo + 1));
 704               TRACE("\tfound directory - %i icon families\n", iconDirCount);
 705             }
 706             if( pTInfo->type_id == NE_RSCTYPE_ICON )
 707             { iconCount = pTInfo->count;
 708               pIconStorage = ((NE_NAMEINFO*)(pTInfo + 1));
 709               TRACE("\ttotal icons - %i\n", iconCount);
 710             }
 711             pTInfo = (NE_TYPEINFO *)((char*)(pTInfo+1)+pTInfo->count*sizeof(NE_NAMEINFO));
 712           }
 713
 714           /* load resources and create icons */
 715
 716           if( (pIconStorage && pIconDir) || lpiID )
 717           { if( nIconIndex == (UINT16)-1 )
 718             { RetPtr[0] = iconDirCount;
 719             }
 720             else if( nIconIndex < iconDirCount )
 721             { UINT16   i, icon;
 722               if( n > iconDirCount - nIconIndex )
 723                 n = iconDirCount - nIconIndex;
 724
 725               for( i = nIconIndex; i < nIconIndex + n; i++ )
 726               { /* .ICO files have only one icon directory */
 727
 728                 if( lpiID == NULL )
 729                   hIcon = SHELL_LoadResource( hInstance, hFile, pIconDir + i, *(WORD*)pData );
 730                 RetPtr[i-nIconIndex] = GetIconID16( hIcon, 3 );
 731                 GlobalFree16(hIcon);
 732               }
 733
 734               for( icon = nIconIndex; icon < nIconIndex + n; icon++ )
 735               { hIcon = 0;
 736                 if( lpiID )
 737                 { hIcon = ICO_LoadIcon( hInstance, hFile, lpiID->idEntries + RetPtr[icon-nIconIndex]);
 738                 }
 739                 else
 740                 { for( i = 0; i < iconCount; i++ )
 741                   { if( pIconStorage[i].id == (RetPtr[icon-nIconIndex] | 0x8000) )
 742                     { hIcon = SHELL_LoadResource( hInstance, hFile, pIconStorage + i,*(WORD*)pData );
 743                     }
 744                   }
 745                 }
 746                 if( hIcon )
 747                 { RetPtr[icon-nIconIndex] = LoadIconHandler16( hIcon, TRUE );
 748                   FarSetOwner16( RetPtr[icon-nIconIndex], GetExePtr(hInstance) );
 749                 }
 750                 else
 751                 { RetPtr[icon-nIconIndex] = 0;
 752                 }
 753               }
 754             }
 755           }
 756           if( lpiID )
 757             HeapFree( GetProcessHeap(), 0, lpiID);
 758           else
 759             HeapFree( GetProcessHeap(), 0, pData);
 760         }
 761
 762         if( sig == IMAGE_NT_SIGNATURE)
 763         { LPBYTE                idata,igdata;
 764           PIMAGE_DOS_HEADER     dheader;
 765           PIMAGE_NT_HEADERS     pe_header;
 766           PIMAGE_SECTION_HEADER pe_sections;
 767           PIMAGE_RESOURCE_DIRECTORY     rootresdir,iconresdir,icongroupresdir;
 768           PIMAGE_RESOURCE_DATA_ENTRY    idataent,igdataent;
 769           int                   i,j;
 770           PIMAGE_RESOURCE_DIRECTORY_ENTRY       xresent;
 771           CURSORICONDIR         **cids;
 772
 773           fmapping = CreateFileMappingA(hFile,NULL,PAGE_READONLY|SEC_COMMIT,0,0,NULL);
 774           if (fmapping == 0)
 775           { /* FIXME, INVALID_HANDLE_VALUE? */
 776             WARN("failed to create filemap.\n");
 777             hRet = 0;
 778             goto end_2; /* failure */
 779           }
 780           peimage = MapViewOfFile(fmapping,FILE_MAP_READ,0,0,0);
 781           if (!peimage)
 782           { WARN("failed to mmap filemap.\n");
 783             hRet = 0;
 784             goto end_2; /* failure */
 785           }
 786           dheader = (PIMAGE_DOS_HEADER)peimage;
 787
 788           /* it is a pe header, SHELL_GetResourceTable checked that */
 789           pe_header = (PIMAGE_NT_HEADERS)(peimage+dheader->e_lfanew);
 790
 791           /* probably makes problems with short PE headers... but I haven't seen
 792           * one yet...
 793           */
 794           pe_sections = (PIMAGE_SECTION_HEADER)(((char*)pe_header)+sizeof(*pe_header));
 795           rootresdir = NULL;
 796
 797           for (i=0;i<pe_header->FileHeader.NumberOfSections;i++)
 798           { if (pe_sections[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
 799               continue;
 800             /* FIXME: doesn't work when the resources are not in a seperate section */
 801             if (pe_sections[i].VirtualAddress == pe_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress)
 802             { rootresdir = (PIMAGE_RESOURCE_DIRECTORY)((char*)peimage+pe_sections[i].PointerToRawData);
 803               break;
 804             }
 805           }
 806
 807           if (!rootresdir)
 808           { WARN("haven't found section for resource directory.\n");
 809             goto end_4; /* failure */
 810           }
 811
 812           icongroupresdir = GetResDirEntryW(rootresdir,RT_GROUP_ICONW, (DWORD)rootresdir,FALSE);
 813
 814           if (!icongroupresdir)
 815           { WARN("No Icongroupresourcedirectory!\n");
 816             goto end_4; /* failure */
 817           }
 818
 819           iconDirCount = icongroupresdir->NumberOfNamedEntries+icongroupresdir->NumberOfIdEntries;
 820
 821           if( nIconIndex == (UINT16)-1 )
 822           { RetPtr[0] = iconDirCount;
 823             goto end_3; /* success */
 824           }
 825
 826           if (nIconIndex >= iconDirCount)
 827           { WARN("nIconIndex %d is larger than iconDirCount %d\n",nIconIndex,iconDirCount);
 828             GlobalFree16(hRet);
 829             goto end_4; /* failure */
 830           }
 831
 832           cids = (CURSORICONDIR**)HeapAlloc(GetProcessHeap(),0,n*sizeof(CURSORICONDIR*));
 833
 834           /* caller just wanted the number of entries */
 835           xresent = (PIMAGE_RESOURCE_DIRECTORY_ENTRY)(icongroupresdir+1);
 836
 837           /* assure we don't get too much ... */
 838           if( n > iconDirCount - nIconIndex )
 839           { n = iconDirCount - nIconIndex;
 840           }
 841
 842           /* starting from specified index ... */
 843           xresent = xresent+nIconIndex;
 844
 845           for (i=0;i<n;i++,xresent++)
 846           { CURSORICONDIR       *cid;
 847             PIMAGE_RESOURCE_DIRECTORY   resdir;
 848
 849             /* go down this resource entry, name */
 850             resdir = (PIMAGE_RESOURCE_DIRECTORY)((DWORD)rootresdir+(xresent->u2.s.OffsetToDirectory));
 851
 852             /* default language (0) */
 853             resdir = GetResDirEntryW(resdir,(LPWSTR)0,(DWORD)rootresdir,TRUE);
 854             igdataent = (PIMAGE_RESOURCE_DATA_ENTRY)resdir;
 855
 856             /* lookup address in mapped image for virtual address */
 857             igdata = NULL;
 858
 859             for (j=0;j<pe_header->FileHeader.NumberOfSections;j++)
 860             { if (igdataent->OffsetToData < pe_sections[j].VirtualAddress)
 861                 continue;
 862               if (igdataent->OffsetToData+igdataent->Size > pe_sections[j].VirtualAddress+pe_sections[j].SizeOfRawData)
 863                 continue;
 864               igdata = peimage+(igdataent->OffsetToData-pe_sections[j].VirtualAddress+pe_sections[j].PointerToRawData);
 865             }
 866
 867             if (!igdata)
 868             { WARN("no matching real address for icongroup!\n");
 869               goto end_4;       /* failure */
 870             }
 871             /* found */
 872             cid = (CURSORICONDIR*)igdata;
 873             cids[i] = cid;
 874             RetPtr[i] = LookupIconIdFromDirectoryEx(igdata,TRUE,GetSystemMetrics(SM_CXICON),GetSystemMetrics(SM_CYICON),0);
 875           }
 876
 877           iconresdir=GetResDirEntryW(rootresdir,RT_ICONW,(DWORD)rootresdir,FALSE);
 878
 879           if (!iconresdir)
 880           { WARN("No Iconresourcedirectory!\n");
 881             goto end_4; /* failure */
 882           }
 883
 884           for (i=0;i<n;i++)
 885           { PIMAGE_RESOURCE_DIRECTORY   xresdir;
 886             xresdir = GetResDirEntryW(iconresdir,(LPWSTR)(DWORD)RetPtr[i],(DWORD)rootresdir,FALSE);
 887             xresdir = GetResDirEntryW(xresdir,(LPWSTR)0,(DWORD)rootresdir,TRUE);
 888             idataent = (PIMAGE_RESOURCE_DATA_ENTRY)xresdir;
 889             idata = NULL;
 890
 891             /* map virtual to address in image */
 892             for (j=0;j<pe_header->FileHeader.NumberOfSections;j++)
 893             { if (idataent->OffsetToData < pe_sections[j].VirtualAddress)
 894                 continue;
 895               if (idataent->OffsetToData+idataent->Size > pe_sections[j].VirtualAddress+pe_sections[j].SizeOfRawData)
 896                 continue;
 897               idata = peimage+(idataent->OffsetToData-pe_sections[j].VirtualAddress+pe_sections[j].PointerToRawData);
 898             }
 899             if (!idata)
 900             { WARN("no matching real address found for icondata!\n");
 901               RetPtr[i]=0;
 902               continue;
 903             }
 904             RetPtr[i] = CreateIconFromResourceEx(idata,idataent->Size,TRUE,0x00030000,GetSystemMetrics(SM_CXICON),GetSystemMetrics(SM_CYICON),0);
 905           }
 906           goto end_3;   /* sucess */
 907         }
 908         goto end_1;     /* return array with icon handles */
 909
 910 /* cleaning up (try & catch would be nicer) */
 911 end_4:  hRet = 0;       /* failure */
 912 end_3:  UnmapViewOfFile(peimage);       /* success */
 913 end_2:  CloseHandle(fmapping);
 914 end_1:  _lclose( hFile);
 915         return hRet;
 916 }
 917
 918 /*************************************************************************
 919  *             ExtractIcon16   (SHELL.34)
 920  */
 921 HICON16 WINAPI ExtractIcon16( HINSTANCE16 hInstance, LPCSTR lpszExeFileName,
 922         UINT16 nIconIndex )
 923 {   TRACE("\n");
 924     return ExtractIconA( hInstance, lpszExeFileName, nIconIndex );
 925 }
 926
 927 /*************************************************************************
 928  *             ExtractIconEx16   (SHELL.40)
 929  */
 930 HICON16 WINAPI ExtractIconEx16(
 931         LPCSTR lpszFile, INT16 nIconIndex, HICON16 *phiconLarge,
 932         HICON16 *phiconSmall, UINT16 nIcons
 933 ) {
 934     HICON       *ilarge,*ismall;
 935     UINT16      ret;
 936     int         i;
 937
 938     if (phiconLarge)
 939         ilarge = (HICON*)HeapAlloc(GetProcessHeap(),0,nIcons*sizeof(HICON));
 940     else
 941         ilarge = NULL;
 942     if (phiconSmall)
 943         ismall = (HICON*)HeapAlloc(GetProcessHeap(),0,nIcons*sizeof(HICON));
 944     else
 945         ismall = NULL;
 946     ret = ExtractIconExA(lpszFile,nIconIndex,ilarge,ismall,nIcons);
 947     if (ilarge) {
 948         for (i=0;i<nIcons;i++)
 949             phiconLarge[i]=ilarge[i];
 950         HeapFree(GetProcessHeap(),0,ilarge);
 951     }
 952     if (ismall) {
 953         for (i=0;i<nIcons;i++)
 954             phiconSmall[i]=ismall[i];
 955         HeapFree(GetProcessHeap(),0,ismall);
 956     }
 957     return ret;
 958 }
 959
 960 /*************************************************************************
 961  *                              ExtractAssociatedIconA
 962  *
 963  * Return icon for given file (either from file itself or from associated
 964  * executable) and patch parameters if needed.
 965  */
 966 HICON WINAPI ExtractAssociatedIconA(HINSTANCE hInst, LPSTR lpIconPath, LPWORD lpiIcon)
 967 {       TRACE("\n");
 968         return ExtractAssociatedIcon16(hInst,lpIconPath,lpiIcon);
 969 }
 970
 971 /*************************************************************************
 972  *                              ExtractAssociatedIcon   [SHELL.36]
 973  *
 974  * Return icon for given file (either from file itself or from associated
 975  * executable) and patch parameters if needed.
 976  */
 977 HICON16 WINAPI ExtractAssociatedIcon16(HINSTANCE16 hInst, LPSTR lpIconPath, LPWORD lpiIcon)
 978 {       HICON16 hIcon;
 979         WORD wDummyIcon = 0;
 980
 981         TRACE("\n");
 982
 983         if(lpiIcon == NULL)
 984             lpiIcon = &wDummyIcon;
 985
 986         hIcon = ExtractIcon16(hInst, lpIconPath, *lpiIcon);
 987
 988         if( hIcon < 2 )
 989         { if( hIcon == 1 ) /* no icons found in given file */
 990           { char  tempPath[0x80];
 991             UINT16  uRet = FindExecutable16(lpIconPath,NULL,tempPath);
 992
 993             if( uRet > 32 && tempPath[0] )
 994             { strcpy(lpIconPath,tempPath);
 995               hIcon = ExtractIcon16(hInst, lpIconPath, *lpiIcon);
 996               if( hIcon > 2 )
 997                 return hIcon;
 998             }
 999             else hIcon = 0;
1000           }
1001
1002           if( hIcon == 1 )
1003             *lpiIcon = 2;   /* MSDOS icon - we found .exe but no icons in it */
1004           else
1005             *lpiIcon = 6;   /* generic icon - found nothing */
1006
1007           GetModuleFileName16(hInst, lpIconPath, 0x80);
1008           hIcon = LoadIcon16( hInst, MAKEINTRESOURCE16(*lpiIcon));
1009         }
1010         return hIcon;
1011 }
1012
1013 /*************************************************************************
1014  *                              FindEnvironmentString   [SHELL.38]
1015  *
1016  * Returns a pointer into the DOS environment... Ugh.
1017  */
1018 LPSTR SHELL_FindString(LPSTR lpEnv, LPCSTR entry)
1019 { UINT16 l;
1020
1021   TRACE("\n");
1022
1023   l = strlen(entry);
1024   for( ; *lpEnv ; lpEnv+=strlen(lpEnv)+1 )
1025   { if( lstrncmpiA(lpEnv, entry, l) )
1026       continue;
1027         if( !*(lpEnv+l) )
1028             return (lpEnv + l);                 /* empty entry */
1029         else if ( *(lpEnv+l)== '=' )
1030             return (lpEnv + l + 1);
1031     }
1032     return NULL;
1033 }
1034
1035 SEGPTR WINAPI FindEnvironmentString16(LPSTR str)
1036 { SEGPTR  spEnv;
1037   LPSTR lpEnv,lpString;
1038   TRACE("\n");
1039
1040   spEnv = GetDOSEnvironment16();
1041
1042   lpEnv = (LPSTR)PTR_SEG_TO_LIN(spEnv);
1043   lpString = (spEnv)?SHELL_FindString(lpEnv, str):NULL;
1044
1045     if( lpString )              /*  offset should be small enough */
1046         return spEnv + (lpString - lpEnv);
1047     return (SEGPTR)NULL;
1048 }
1049
1050 /*************************************************************************
1051  *                              DoEnvironmentSubst      [SHELL.37]
1052  *
1053  * Replace %KEYWORD% in the str with the value of variable KEYWORD
1054  * from "DOS" environment.
1055  */
1056 DWORD WINAPI DoEnvironmentSubst16(LPSTR str,WORD length)
1057 {
1058   LPSTR   lpEnv = (LPSTR)PTR_SEG_TO_LIN(GetDOSEnvironment16());
1059   LPSTR   lpBuffer = (LPSTR)HeapAlloc( GetProcessHeap(), 0, length);
1060   LPSTR   lpstr = str;
1061   LPSTR   lpbstr = lpBuffer;
1062
1063   CharToOemA(str,str);
1064
1065   TRACE("accept %s\n", str);
1066
1067   while( *lpstr && lpbstr - lpBuffer < length )
1068    {
1069      LPSTR lpend = lpstr;
1070
1071      if( *lpstr == '%' )
1072        {
1073           do { lpend++; } while( *lpend && *lpend != '%' );
1074           if( *lpend == '%' && lpend - lpstr > 1 )      /* found key */
1075             {
1076                LPSTR lpKey;
1077               *lpend = '\0';
1078                lpKey = SHELL_FindString(lpEnv, lpstr+1);
1079                if( lpKey )                              /* found key value */
1080                  {
1081                    int l = strlen(lpKey);
1082
1083                    if( l > length - (lpbstr - lpBuffer) - 1 )
1084                      {
1085            WARN("-- Env subst aborted - string too short\n");
1086                       *lpend = '%';
1087                        break;
1088                      }
1089                    strcpy(lpbstr, lpKey);
1090                    lpbstr += l;
1091                  }
1092                else break;
1093               *lpend = '%';
1094                lpstr = lpend + 1;
1095             }
1096           else break;                                   /* back off and whine */
1097
1098           continue;
1099        }
1100
1101      *lpbstr++ = *lpstr++;
1102    }
1103
1104  *lpbstr = '\0';
1105   if( lpstr - str == strlen(str) )
1106     {
1107       strncpy(str, lpBuffer, length);
1108       length = 1;
1109     }
1110   else
1111       length = 0;
1112
1113   TRACE("-- return %s\n", str);
1114
1115   OemToCharA(str,str);
1116   HeapFree( GetProcessHeap(), 0, lpBuffer);
1117
1118   /*  Return str length in the LOWORD
1119    *  and 1 in HIWORD if subst was successful.
1120    */
1121  return (DWORD)MAKELONG(strlen(str), length);
1122 }
1123
1124 /*************************************************************************
1125  *                              ShellHookProc           [SHELL.103]
1126  * System-wide WH_SHELL hook.
1127  */
1128 LRESULT WINAPI ShellHookProc16(INT16 code, WPARAM16 wParam, LPARAM lParam)
1129 {
1130     TRACE("%i, %04x, %08x\n", code, wParam,
1131                                                       (unsigned)lParam );
1132     if( SHELL_hHook && SHELL_hWnd )
1133     {
1134         UINT16  uMsg = 0;
1135         switch( code )
1136         {
1137             case HSHELL_WINDOWCREATED:          uMsg = uMsgWndCreated;   break;
1138             case HSHELL_WINDOWDESTROYED:        uMsg = uMsgWndDestroyed; break;
1139             case HSHELL_ACTIVATESHELLWINDOW:    uMsg = uMsgShellActivate;
1140         }
1141         PostMessage16( SHELL_hWnd, uMsg, wParam, 0 );
1142     }
1143     return CallNextHookEx16( WH_SHELL, code, wParam, lParam );
1144 }
1145
1146 /*************************************************************************
1147  *                              RegisterShellHook       [SHELL.102]
1148  */
1149 BOOL WINAPI RegisterShellHook16(HWND16 hWnd, UINT16 uAction)
1150 {
1151     TRACE("%04x [%u]\n", hWnd, uAction );
1152
1153     switch( uAction )
1154     {
1155     case 2:  /* register hWnd as a shell window */
1156         if( !SHELL_hHook )
1157         {
1158             HMODULE16 hShell = GetModuleHandle16( "SHELL" );
1159             HOOKPROC16 hookProc = (HOOKPROC16)NE_GetEntryPoint( hShell, 103 );
1160             SHELL_hHook = SetWindowsHookEx16( WH_SHELL, hookProc, hShell, 0 );
1161             if ( SHELL_hHook )
1162             {
1163                 uMsgWndCreated = RegisterWindowMessageA( lpstrMsgWndCreated );
1164                 uMsgWndDestroyed = RegisterWindowMessageA( lpstrMsgWndDestroyed );
1165                 uMsgShellActivate = RegisterWindowMessageA( lpstrMsgShellActivate );
1166             }
1167             else
1168                 WARN("-- unable to install ShellHookProc()!\n");
1169         }
1170
1171         if ( SHELL_hHook )
1172             return ((SHELL_hWnd = hWnd) != 0);
1173         break;
1174
1175     default:
1176         WARN("-- unknown code %i\n", uAction );
1177         SHELL_hWnd = 0; /* just in case */
1178     }
1179     return FALSE;
1180 }