src/msw/utils.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/utils.cpp
   3 // Purpose:     Various utilities
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21 // #pragma implementation "utils.h"   // Note: this is done in utilscmn.cpp now.
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/utils.h"
  33     #include "wx/app.h"
  34     #include "wx/intl.h"
  35     #include "wx/log.h"
  36 #if wxUSE_GUI
  37     #include "wx/cursor.h"
  38 #endif
  39 #endif  //WX_PRECOMP
  40
  41 // In some mingws there is a missing extern "C" int the winsock header,
  42 // so we put it here just to be safe. Note that this must appear _before_
  43 // #include "wx/msw/private.h" which itself includes <windows.h>, as this
  44 // one in turn includes <winsock.h> unless we define WIN32_LEAN_AND_MEAN.
  45 //
  46 #if defined(__WIN32__) && !defined(__TWIN32__) && !defined(__WXMICROWIN__) && ! (defined(__GNUWIN32__) && !defined(__MINGW32__))
  47 extern "C" {
  48     #include <winsock.h>    // we use socket functions in wxGetFullHostName()
  49 }
  50 #endif
  51
  52 #include "wx/msw/private.h"     // includes <windows.h>
  53
  54 #include "wx/timer.h"
  55
  56 #if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__)
  57     #include <direct.h>
  58
  59     #ifndef __MWERKS__
  60         #include <dos.h>
  61     #endif
  62 #endif  //GNUWIN32
  63
  64 #if defined(__CYGWIN__) && !defined(__TWIN32__)
  65     #include <sys/unistd.h>
  66     #include <sys/stat.h>
  67     #include <sys/cygwin.h> // for cygwin_conv_to_full_win32_path()
  68 #endif  //GNUWIN32
  69
  70 #ifdef __BORLANDC__ // Please someone tell me which version of Borland needs
  71                     // this (3.1 I believe) and how to test for it.
  72                     // If this works for Borland 4.0 as well, then no worries.
  73     #include <dir.h>
  74 #endif
  75
  76 // VZ: there is some code using NetXXX() functions to get the full user name:
  77 //     I don't think it's a good idea because they don't work under Win95 and
  78 //     seem to return the same as wxGetUserId() under NT. If you really want
  79 //     to use them, just #define USE_NET_API
  80 #undef USE_NET_API
  81
  82 #ifdef USE_NET_API
  83     #include <lm.h>
  84 #endif // USE_NET_API
  85
  86 #if defined(__WIN32__) && !defined(__WXWINE__) && !defined(__WXMICROWIN__)
  87     #include <io.h>
  88
  89     #ifndef __GNUWIN32__
  90         #include <shellapi.h>
  91     #endif
  92 #endif
  93
  94 #ifndef __WATCOMC__
  95     #if !(defined(_MSC_VER) && (_MSC_VER > 800))
  96         #include <errno.h>
  97     #endif
  98 #endif
  99
 100 //// BEGIN for console support: VC++ only
 101 #ifdef __VISUALC__
 102
 103 #include "wx/msw/msvcrt.h"
 104
 105 #include <fcntl.h>
 106
 107 #include "wx/ioswrap.h"
 108
 109 /* Need to undef new if including crtdbg.h */
 110 #  ifdef new
 111 #  undef new
 112 #  endif
 113
 114 #ifndef __WIN16__
 115 #  include <crtdbg.h>
 116 #endif
 117
 118 #  if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS
 119 #  define new new(__TFILE__,__LINE__)
 120 #  endif
 121
 122 #endif
 123   // __VISUALC__
 124 /// END for console support
 125
 126 // ----------------------------------------------------------------------------
 127 // constants
 128 // ----------------------------------------------------------------------------
 129
 130 // In the WIN.INI file
 131 static const wxChar WX_SECTION[] = wxT("wxWindows");
 132 static const wxChar eUSERNAME[]  = wxT("UserName");
 133
 134 // these are only used under Win16
 135 #if !defined(__WIN32__) && !defined(__WXMICROWIN__)
 136 static const wxChar eHOSTNAME[]  = wxT("HostName");
 137 static const wxChar eUSERID[]    = wxT("UserId");
 138 #endif // !Win32
 139
 140 #ifndef __WXMICROWIN__
 141
 142 // ============================================================================
 143 // implementation
 144 // ============================================================================
 145
 146 // ----------------------------------------------------------------------------
 147 // get host name and related
 148 // ----------------------------------------------------------------------------
 149
 150 // Get hostname only (without domain name)
 151 bool wxGetHostName(wxChar *buf, int maxSize)
 152 {
 153 #if defined(__WIN32__) && !defined(__TWIN32__) && !defined(__WXMICROWIN__)
 154     DWORD nSize = maxSize;
 155     if ( !::GetComputerName(buf, &nSize) )
 156     {
 157         wxLogLastError(wxT("GetComputerName"));
 158
 159         return FALSE;
 160     }
 161
 162     return TRUE;
 163 #else
 164     wxChar *sysname;
 165     const wxChar *default_host = wxT("noname");
 166
 167     if ((sysname = wxGetenv(wxT("SYSTEM_NAME"))) == NULL) {
 168         GetProfileString(WX_SECTION, eHOSTNAME, default_host, buf, maxSize - 1);
 169     } else
 170         wxStrncpy(buf, sysname, maxSize - 1);
 171     buf[maxSize] = wxT('\0');
 172     return *buf ? TRUE : FALSE;
 173 #endif
 174 }
 175
 176 // get full hostname (with domain name if possible)
 177 bool wxGetFullHostName(wxChar *buf, int maxSize)
 178 {
 179 #if defined(__WIN32__) && !defined(__TWIN32__) && !defined(__WXMICROWIN__) && ! (defined(__GNUWIN32__) && !defined(__MINGW32__))
 180     // TODO should use GetComputerNameEx() when available
 181     WSADATA wsa;
 182     if ( WSAStartup(MAKEWORD(1, 1), &wsa) == 0 )
 183     {
 184         wxString host;
 185         char bufA[256];
 186         if ( gethostname(bufA, WXSIZEOF(bufA)) == 0 )
 187         {
 188             // gethostname() won't usually include the DNS domain name, for
 189             // this we need to work a bit more
 190             if ( !strchr(bufA, '.') )
 191             {
 192                 struct hostent *pHostEnt =  gethostbyname(bufA);
 193
 194                 if ( pHostEnt )
 195                 {
 196                     // Windows will use DNS internally now
 197                     pHostEnt = gethostbyaddr(pHostEnt->h_addr, 4, PF_INET);
 198                 }
 199
 200                 if ( pHostEnt )
 201                 {
 202                     host = pHostEnt->h_name;
 203                 }
 204             }
 205         }
 206
 207         WSACleanup();
 208
 209         if ( !!host )
 210         {
 211             wxStrncpy(buf, host, maxSize);
 212
 213             return TRUE;
 214         }
 215     }
 216 #endif // Win32
 217
 218     return wxGetHostName(buf, maxSize);
 219 }
 220
 221 // Get user ID e.g. jacs
 222 bool wxGetUserId(wxChar *buf, int maxSize)
 223 {
 224 #if defined(__WIN32__) && !defined(__win32s__) && !defined(__TWIN32__) && !defined(__WXMICROWIN__)
 225     DWORD nSize = maxSize;
 226     if ( ::GetUserName(buf, &nSize) == 0 )
 227     {
 228         // actually, it does happen on Win9x if the user didn't log on
 229         DWORD res = ::GetEnvironmentVariable(wxT("username"), buf, maxSize);
 230         if ( res == 0 )
 231         {
 232             // not found
 233             return FALSE;
 234         }
 235     }
 236
 237     return TRUE;
 238 #else   // Win16 or Win32s
 239     wxChar *user;
 240     const wxChar *default_id = wxT("anonymous");
 241
 242     // Can't assume we have NIS (PC-NFS) or some other ID daemon
 243     // So we ...
 244     if (  (user = wxGetenv(wxT("USER"))) == NULL &&
 245             (user = wxGetenv(wxT("LOGNAME"))) == NULL )
 246     {
 247         // Use wxWindows configuration data (comming soon)
 248         GetProfileString(WX_SECTION, eUSERID, default_id, buf, maxSize - 1);
 249     }
 250     else
 251     {
 252         wxStrncpy(buf, user, maxSize - 1);
 253     }
 254
 255     return *buf ? TRUE : FALSE;
 256 #endif
 257 }
 258
 259 // Get user name e.g. Julian Smart
 260 bool wxGetUserName(wxChar *buf, int maxSize)
 261 {
 262 #if wxUSE_PENWINDOWS && !defined(__WATCOMC__) && !defined(__GNUWIN32__)
 263     extern HANDLE g_hPenWin; // PenWindows Running?
 264     if (g_hPenWin)
 265     {
 266         // PenWindows Does have a user concept!
 267         // Get the current owner of the recognizer
 268         GetPrivateProfileString("Current", "User", default_name, wxBuffer, maxSize - 1, "PENWIN.INI");
 269         strncpy(buf, wxBuffer, maxSize - 1);
 270     }
 271     else
 272 #endif
 273     {
 274 #ifdef USE_NET_API
 275         CHAR szUserName[256];
 276         if ( !wxGetUserId(szUserName, WXSIZEOF(szUserName)) )
 277             return FALSE;
 278
 279         // TODO how to get the domain name?
 280         CHAR *szDomain = "";
 281
 282         // the code is based on the MSDN example (also see KB article Q119670)
 283         WCHAR wszUserName[256];          // Unicode user name
 284         WCHAR wszDomain[256];
 285         LPBYTE ComputerName;
 286
 287         USER_INFO_2 *ui2;         // User structure
 288
 289         // Convert ANSI user name and domain to Unicode
 290         MultiByteToWideChar( CP_ACP, 0, szUserName, strlen(szUserName)+1,
 291                 wszUserName, WXSIZEOF(wszUserName) );
 292         MultiByteToWideChar( CP_ACP, 0, szDomain, strlen(szDomain)+1,
 293                 wszDomain, WXSIZEOF(wszDomain) );
 294
 295         // Get the computer name of a DC for the domain.
 296         if ( NetGetDCName( NULL, wszDomain, &ComputerName ) != NERR_Success )
 297         {
 298             wxLogError(wxT("Can not find domain controller"));
 299
 300             goto error;
 301         }
 302
 303         // Look up the user on the DC
 304         NET_API_STATUS status = NetUserGetInfo( (LPWSTR)ComputerName,
 305                 (LPWSTR)&wszUserName,
 306                 2, // level - we want USER_INFO_2
 307                 (LPBYTE *) &ui2 );
 308         switch ( status )
 309         {
 310             case NERR_Success:
 311                 // ok
 312                 break;
 313
 314             case NERR_InvalidComputer:
 315                 wxLogError(wxT("Invalid domain controller name."));
 316
 317                 goto error;
 318
 319             case NERR_UserNotFound:
 320                 wxLogError(wxT("Invalid user name '%s'."), szUserName);
 321
 322                 goto error;
 323
 324             default:
 325                 wxLogSysError(wxT("Can't get information about user"));
 326
 327                 goto error;
 328         }
 329
 330         // Convert the Unicode full name to ANSI
 331         WideCharToMultiByte( CP_ACP, 0, ui2->usri2_full_name, -1,
 332                 buf, maxSize, NULL, NULL );
 333
 334         return TRUE;
 335
 336 error:
 337         wxLogError(wxT("Couldn't look up full user name."));
 338
 339         return FALSE;
 340 #else  // !USE_NET_API
 341         // Could use NIS, MS-Mail or other site specific programs
 342         // Use wxWindows configuration data
 343         bool ok = GetProfileString(WX_SECTION, eUSERNAME, wxT(""), buf, maxSize - 1) != 0;
 344         if ( !ok )
 345         {
 346             ok = wxGetUserId(buf, maxSize);
 347         }
 348
 349         if ( !ok )
 350         {
 351             wxStrncpy(buf, wxT("Unknown User"), maxSize);
 352         }
 353 #endif // Win32/16
 354     }
 355
 356     return TRUE;
 357 }
 358
 359 const wxChar* wxGetHomeDir(wxString *pstr)
 360 {
 361   wxString& strDir = *pstr;
 362
 363   #if defined(__UNIX__) && !defined(__TWIN32__)
 364     const wxChar *szHome = wxGetenv("HOME");
 365     if ( szHome == NULL ) {
 366       // we're homeless...
 367       wxLogWarning(_("can't find user's HOME, using current directory."));
 368       strDir = wxT(".");
 369     }
 370     else
 371        strDir = szHome;
 372
 373     // add a trailing slash if needed
 374     if ( strDir.Last() != wxT('/') )
 375       strDir << wxT('/');
 376
 377     #ifdef __CYGWIN__
 378       // Cygwin returns unix type path but that does not work well
 379       static wxChar windowsPath[MAX_PATH];
 380       cygwin_conv_to_full_win32_path(strDir, windowsPath);
 381       strDir = windowsPath;
 382     #endif
 383   #else   // Windows
 384     #ifdef  __WIN32__
 385       const wxChar *szHome = wxGetenv(wxT("HOMEDRIVE"));
 386       if ( szHome != NULL )
 387         strDir << szHome;
 388       szHome = wxGetenv(wxT("HOMEPATH"));
 389       if ( szHome != NULL ) {
 390         strDir << szHome;
 391
 392         // the idea is that under NT these variables have default values
 393         // of "%systemdrive%:" and "\\". As we don't want to create our
 394         // config files in the root directory of the system drive, we will
 395         // create it in our program's dir. However, if the user took care
 396         // to set HOMEPATH to something other than "\\", we suppose that he
 397         // knows what he is doing and use the supplied value.
 398         if ( wxStrcmp(szHome, wxT("\\")) != 0 )
 399           return strDir.c_str();
 400       }
 401
 402     #else   // Win16
 403       // Win16 has no idea about home, so use the working directory instead
 404     #endif  // WIN16/32
 405
 406     // 260 was taken from windef.h
 407     #ifndef MAX_PATH
 408       #define MAX_PATH  260
 409     #endif
 410
 411     wxString strPath;
 412     ::GetModuleFileName(::GetModuleHandle(NULL),
 413                         strPath.GetWriteBuf(MAX_PATH), MAX_PATH);
 414     strPath.UngetWriteBuf();
 415
 416     // extract the dir name
 417     wxSplitPath(strPath, &strDir, NULL, NULL);
 418
 419   #endif  // UNIX/Win
 420
 421   return strDir.c_str();
 422 }
 423
 424 wxChar *wxGetUserHome(const wxString& WXUNUSED(user))
 425 {
 426     // VZ: the old code here never worked for user != "" anyhow! Moreover, it
 427     //     returned sometimes a malloc()'d pointer, sometimes a pointer to a
 428     //     static buffer and sometimes I don't even know what.
 429     static wxString s_home;
 430
 431     return (wxChar *)wxGetHomeDir(&s_home);
 432 }
 433
 434 bool wxDirExists(const wxString& dir)
 435 {
 436 #ifdef __WXMICROWIN__
 437     return wxPathExist(dir);
 438 #elif defined(__WIN32__)
 439     DWORD attribs = GetFileAttributes(dir);
 440     return ((attribs != (DWORD)-1) && (attribs & FILE_ATTRIBUTE_DIRECTORY));
 441 #else // Win16
 442     #ifdef __BORLANDC__
 443         struct ffblk fileInfo;
 444     #else
 445         struct find_t fileInfo;
 446     #endif
 447     // In Borland findfirst has a different argument
 448     // ordering from _dos_findfirst. But _dos_findfirst
 449     // _should_ be ok in both MS and Borland... why not?
 450     #ifdef __BORLANDC__
 451         return (findfirst(dir, &fileInfo, _A_SUBDIR) == 0 &&
 452                (fileInfo.ff_attrib & _A_SUBDIR) != 0);
 453     #else
 454         return (_dos_findfirst(dir, _A_SUBDIR, &fileInfo) == 0) &&
 455                ((fileInfo.attrib & _A_SUBDIR) != 0);
 456     #endif
 457 #endif // Win32/16
 458 }
 459
 460 bool wxGetDiskSpace(const wxString& path, wxLongLong *pTotal, wxLongLong *pFree)
 461 {
 462     if ( path.empty() )
 463         return FALSE;
 464
 465 // old w32api don't have ULARGE_INTEGER
 466 #if defined(__WIN32__) && \
 467     (!defined(__GNUWIN32__) || wxCHECK_W32API_VERSION( 0, 3 ))
 468     // GetDiskFreeSpaceEx() is not available under original Win95, check for
 469     // it
 470     typedef BOOL (WINAPI *GetDiskFreeSpaceEx_t)(LPCTSTR,
 471                                                 PULARGE_INTEGER,
 472                                                 PULARGE_INTEGER,
 473                                                 PULARGE_INTEGER);
 474
 475     GetDiskFreeSpaceEx_t
 476         pGetDiskFreeSpaceEx = (GetDiskFreeSpaceEx_t)::GetProcAddress
 477                               (
 478                                 ::GetModuleHandle(_T("kernel32.dll")),
 479 #if wxUSE_UNICODE
 480                                 "GetDiskFreeSpaceExW"
 481 #else
 482                                 "GetDiskFreeSpaceExA"
 483 #endif
 484                               );
 485
 486     if ( pGetDiskFreeSpaceEx )
 487     {
 488         ULARGE_INTEGER bytesFree, bytesTotal;
 489
 490         // may pass the path as is, GetDiskFreeSpaceEx() is smart enough
 491         if ( !pGetDiskFreeSpaceEx(path,
 492                                   &bytesFree,
 493                                   &bytesTotal,
 494                                   NULL) )
 495         {
 496             wxLogLastError(_T("GetDiskFreeSpaceEx"));
 497
 498             return FALSE;
 499         }
 500
 501         // ULARGE_INTEGER is a union of a 64 bit value and a struct containing
 502         // two 32 bit fields which may be or may be not named - try to make it
 503         // compile in all cases
 504 #if defined(__BORLANDC__) && !defined(_ANONYMOUS_STRUCT)
 505         #define UL(ul) ul.u
 506 #else // anon union
 507         #define UL(ul) ul
 508 #endif
 509         if ( pTotal )
 510         {
 511             *pTotal = wxLongLong(UL(bytesTotal).HighPart, UL(bytesTotal).LowPart);
 512         }
 513
 514         if ( pFree )
 515         {
 516             *pFree = wxLongLong(UL(bytesFree).HighPart, UL(bytesFree).LowPart);
 517         }
 518     }
 519     else
 520 #endif // Win32
 521     {
 522         // there's a problem with drives larger than 2GB, GetDiskFreeSpaceEx()
 523         // should be used instead - but if it's not available, fall back on
 524         // GetDiskFreeSpace() nevertheless...
 525
 526         DWORD lSectorsPerCluster,
 527               lBytesPerSector,
 528               lNumberOfFreeClusters,
 529               lTotalNumberOfClusters;
 530
 531         // FIXME: this is wrong, we should extract the root drive from path
 532         //        instead, but this is the job for wxFileName...
 533         if ( !::GetDiskFreeSpace(path,
 534                                  &lSectorsPerCluster,
 535                                  &lBytesPerSector,
 536                                  &lNumberOfFreeClusters,
 537                                  &lTotalNumberOfClusters) )
 538         {
 539             wxLogLastError(_T("GetDiskFreeSpace"));
 540
 541             return FALSE;
 542         }
 543
 544         wxLongLong lBytesPerCluster = lSectorsPerCluster;
 545         lBytesPerCluster *= lBytesPerSector;
 546
 547         if ( pTotal )
 548         {
 549             *pTotal = lBytesPerCluster;
 550             *pTotal *= lTotalNumberOfClusters;
 551         }
 552
 553         if ( pFree )
 554         {
 555             *pFree = lBytesPerCluster;
 556             *pFree *= lNumberOfFreeClusters;
 557         }
 558     }
 559
 560     return TRUE;
 561 }
 562
 563 // ----------------------------------------------------------------------------
 564 // env vars
 565 // ----------------------------------------------------------------------------
 566
 567 bool wxGetEnv(const wxString& var, wxString *value)
 568 {
 569 #ifdef __WIN16__
 570     const wxChar* ret = wxGetenv(var);
 571     if (ret)
 572     {
 573         *value = ret;
 574         return TRUE;
 575     }
 576     else
 577         return FALSE;
 578 #else
 579     // first get the size of the buffer
 580     DWORD dwRet = ::GetEnvironmentVariable(var, NULL, 0);
 581     if ( !dwRet )
 582     {
 583         // this means that there is no such variable
 584         return FALSE;
 585     }
 586
 587     if ( value )
 588     {
 589         (void)::GetEnvironmentVariable(var, value->GetWriteBuf(dwRet), dwRet);
 590         value->UngetWriteBuf();
 591     }
 592
 593     return TRUE;
 594 #endif
 595 }
 596
 597 bool wxSetEnv(const wxString& var, const wxChar *value)
 598 {
 599     // some compilers have putenv() or _putenv() or _wputenv() but it's better
 600     // to always use Win32 function directly instead of dealing with them
 601 #if defined(__WIN32__)
 602     if ( !::SetEnvironmentVariable(var, value) )
 603     {
 604         wxLogLastError(_T("SetEnvironmentVariable"));
 605
 606         return FALSE;
 607     }
 608
 609     return TRUE;
 610 #else // no way to set env vars
 611     return FALSE;
 612 #endif
 613 }
 614
 615 // ----------------------------------------------------------------------------
 616 // process management
 617 // ----------------------------------------------------------------------------
 618
 619 #ifdef __WIN32__
 620
 621 // structure used to pass parameters from wxKill() to wxEnumFindByPidProc()
 622 struct wxFindByPidParams
 623 {
 624     wxFindByPidParams() { hwnd = 0; pid = 0; }
 625
 626     // the HWND used to return the result
 627     HWND hwnd;
 628
 629     // the PID we're looking from
 630     DWORD pid;
 631 };
 632
 633 // wxKill helper: EnumWindows() callback which is used to find the first (top
 634 // level) window belonging to the given process
 635 BOOL CALLBACK wxEnumFindByPidProc(HWND hwnd, LPARAM lParam)
 636 {
 637     DWORD pid;
 638     (void)::GetWindowThreadProcessId(hwnd, &pid);
 639
 640     wxFindByPidParams *params = (wxFindByPidParams *)lParam;
 641     if ( pid == params->pid )
 642     {
 643         // remember the window we found
 644         params->hwnd = hwnd;
 645
 646         // return FALSE to stop the enumeration
 647         return FALSE;
 648     }
 649
 650     // continue enumeration
 651     return TRUE;
 652 }
 653
 654 #endif // __WIN32__
 655
 656 int wxKill(long pid, wxSignal sig, wxKillError *krc)
 657 {
 658 #ifdef __WIN32__
 659     // get the process handle to operate on
 660     HANDLE hProcess = ::OpenProcess(SYNCHRONIZE |
 661                                     PROCESS_TERMINATE |
 662                                     PROCESS_QUERY_INFORMATION,
 663                                     FALSE, // not inheritable
 664                                     (DWORD)pid);
 665     if ( hProcess == NULL )
 666     {
 667         if ( krc )
 668         {
 669             if ( ::GetLastError() == ERROR_ACCESS_DENIED )
 670             {
 671                 *krc = wxKILL_ACCESS_DENIED;
 672             }
 673             else
 674             {
 675                 *krc = wxKILL_NO_PROCESS;
 676             }
 677         }
 678
 679         return -1;
 680     }
 681
 682     bool ok = TRUE;
 683     switch ( sig )
 684     {
 685         case wxSIGKILL:
 686             // kill the process forcefully returning -1 as error code
 687             if ( !::TerminateProcess(hProcess, (UINT)-1) )
 688             {
 689                 wxLogSysError(_("Failed to kill process %d"), pid);
 690
 691                 if ( krc )
 692                 {
 693                     // this is not supposed to happen if we could open the
 694                     // process
 695                     *krc = wxKILL_ERROR;
 696                 }
 697
 698                 ok = FALSE;
 699             }
 700             break;
 701
 702         case wxSIGNONE:
 703             // do nothing, we just want to test for process existence
 704             break;
 705
 706         default:
 707             // any other signal means "terminate"
 708             {
 709                 wxFindByPidParams params;
 710                 params.pid = (DWORD)pid;
 711
 712                 // EnumWindows() has nice semantics: it returns 0 if it found
 713                 // something or if an error occured and non zero if it
 714                 // enumerated all the window
 715                 if ( !::EnumWindows(wxEnumFindByPidProc, (LPARAM)&params) )
 716                 {
 717                     // did we find any window?
 718                     if ( params.hwnd )
 719                     {
 720                         // tell the app to close
 721                         //
 722                         // NB: this is the harshest way, the app won't have
 723                         //     opportunity to save any files, for example, but
 724                         //     this is probably what we want here. If not we
 725                         //     can also use SendMesageTimeout(WM_CLOSE)
 726                         if ( !::PostMessage(params.hwnd, WM_QUIT, 0, 0) )
 727                         {
 728                             wxLogLastError(_T("PostMessage(WM_QUIT)"));
 729                         }
 730                     }
 731                     else // it was an error then
 732                     {
 733                         wxLogLastError(_T("EnumWindows"));
 734
 735                         ok = FALSE;
 736                     }
 737                 }
 738                 else // no windows for this PID
 739                 {
 740                     if ( krc )
 741                     {
 742                         *krc = wxKILL_ERROR;
 743                     }
 744
 745                     ok = FALSE;
 746                 }
 747             }
 748     }
 749
 750     // the return code
 751     DWORD rc;
 752
 753     if ( ok )
 754     {
 755         // as we wait for a short time, we can use just WaitForSingleObject()
 756         // and not MsgWaitForMultipleObjects()
 757         switch ( ::WaitForSingleObject(hProcess, 500 /* msec */) )
 758         {
 759             case WAIT_OBJECT_0:
 760                 // process terminated
 761                 if ( !::GetExitCodeProcess(hProcess, &rc) )
 762                 {
 763                     wxLogLastError(_T("GetExitCodeProcess"));
 764                 }
 765                 break;
 766
 767             default:
 768                 wxFAIL_MSG( _T("unexpected WaitForSingleObject() return") );
 769                 // fall through
 770
 771             case WAIT_FAILED:
 772                 wxLogLastError(_T("WaitForSingleObject"));
 773                 // fall through
 774
 775             case WAIT_TIMEOUT:
 776                 if ( krc )
 777                 {
 778                     *krc = wxKILL_ERROR;
 779                 }
 780
 781                 rc = STILL_ACTIVE;
 782                 break;
 783         }
 784     }
 785     else // !ok
 786     {
 787         // just to suppress the warnings about uninitialized variable
 788         rc = 0;
 789     }
 790
 791     ::CloseHandle(hProcess);
 792
 793     // the return code is the same as from Unix kill(): 0 if killed
 794     // successfully or -1 on error
 795     if ( sig == wxSIGNONE )
 796     {
 797         if ( ok && rc == STILL_ACTIVE )
 798         {
 799             // there is such process => success
 800             return 0;
 801         }
 802     }
 803     else // not SIGNONE
 804     {
 805         if ( ok && rc != STILL_ACTIVE )
 806         {
 807             // killed => success
 808             return 0;
 809         }
 810     }
 811 #else // Win15
 812     wxFAIL_MSG( _T("not implemented") );
 813 #endif // Win32/Win16
 814
 815     // error
 816     return -1;
 817 }
 818
 819 // Execute a program in an Interactive Shell
 820 bool wxShell(const wxString& command)
 821 {
 822     wxChar *shell = wxGetenv(wxT("COMSPEC"));
 823     if ( !shell )
 824         shell = wxT("\\COMMAND.COM");
 825
 826     wxString cmd;
 827     if ( !command )
 828     {
 829         // just the shell
 830         cmd = shell;
 831     }
 832     else
 833     {
 834         // pass the command to execute to the command processor
 835         cmd.Printf(wxT("%s /c %s"), shell, command.c_str());
 836     }
 837
 838     return wxExecute(cmd, TRUE /* sync */) != 0;
 839 }
 840
 841 // ----------------------------------------------------------------------------
 842 // misc
 843 // ----------------------------------------------------------------------------
 844
 845 // Get free memory in bytes, or -1 if cannot determine amount (e.g. on UNIX)
 846 long wxGetFreeMemory()
 847 {
 848 #if defined(__WIN32__) && !defined(__BORLANDC__) && !defined(__TWIN32__)
 849     MEMORYSTATUS memStatus;
 850     memStatus.dwLength = sizeof(MEMORYSTATUS);
 851     GlobalMemoryStatus(&memStatus);
 852     return memStatus.dwAvailPhys;
 853 #else
 854     return (long)GetFreeSpace(0);
 855 #endif
 856 }
 857
 858 // Emit a beeeeeep
 859 void wxBell()
 860 {
 861     ::MessageBeep((UINT)-1);        // default sound
 862 }
 863
 864 wxString wxGetOsDescription()
 865 {
 866 #ifdef __WIN32__
 867     wxString str;
 868
 869     OSVERSIONINFO info;
 870     wxZeroMemory(info);
 871
 872     info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 873     if ( ::GetVersionEx(&info) )
 874     {
 875         switch ( info.dwPlatformId )
 876         {
 877             case VER_PLATFORM_WIN32s:
 878                 str = _("Win32s on Windows 3.1");
 879                 break;
 880
 881             case VER_PLATFORM_WIN32_WINDOWS:
 882                 str.Printf(_("Windows 9%c"),
 883                            info.dwMinorVersion == 0 ? _T('5') : _T('8'));
 884                 if ( !wxIsEmpty(info.szCSDVersion) )
 885                 {
 886                     str << _T(" (") << info.szCSDVersion << _T(')');
 887                 }
 888                 break;
 889
 890             case VER_PLATFORM_WIN32_NT:
 891                 str.Printf(_T("Windows NT %lu.%lu (build %lu"),
 892                            info.dwMajorVersion,
 893                            info.dwMinorVersion,
 894                            info.dwBuildNumber);
 895                 if ( !wxIsEmpty(info.szCSDVersion) )
 896                 {
 897                     str << _T(", ") << info.szCSDVersion;
 898                 }
 899                 str << _T(')');
 900                 break;
 901         }
 902     }
 903     else
 904     {
 905         wxFAIL_MSG( _T("GetVersionEx() failed") ); // should never happen
 906     }
 907
 908     return str;
 909 #else // Win16
 910     return _("Windows 3.1");
 911 #endif // Win32/16
 912 }
 913
 914 int wxGetOsVersion(int *majorVsn, int *minorVsn)
 915 {
 916 #if defined(__WIN32__) && !defined(__SC__)
 917     OSVERSIONINFO info;
 918     wxZeroMemory(info);
 919
 920     info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 921     if ( ::GetVersionEx(&info) )
 922     {
 923         if (majorVsn)
 924             *majorVsn = info.dwMajorVersion;
 925         if (minorVsn)
 926             *minorVsn = info.dwMinorVersion;
 927
 928         switch ( info.dwPlatformId )
 929         {
 930             case VER_PLATFORM_WIN32s:
 931                 return wxWIN32S;
 932
 933             case VER_PLATFORM_WIN32_WINDOWS:
 934                 return wxWIN95;
 935
 936             case VER_PLATFORM_WIN32_NT:
 937                 return wxWINDOWS_NT;
 938         }
 939     }
 940
 941     return wxWINDOWS; // error if we get here, return generic value
 942 #else // Win16
 943     int retValue = wxWINDOWS;
 944     #ifdef __WINDOWS_386__
 945         retValue = wxWIN386;
 946     #else
 947         #if !defined(__WATCOMC__) && !defined(GNUWIN32) && wxUSE_PENWINDOWS
 948             extern HANDLE g_hPenWin;
 949             retValue = g_hPenWin ? wxPENWINDOWS : wxWINDOWS;
 950         #endif
 951     #endif
 952
 953     if (majorVsn)
 954         *majorVsn = 3;
 955     if (minorVsn)
 956         *minorVsn = 1;
 957
 958     return retValue;
 959 #endif
 960 }
 961
 962 // ----------------------------------------------------------------------------
 963 // sleep functions
 964 // ----------------------------------------------------------------------------
 965
 966 #if wxUSE_GUI
 967
 968 #if wxUSE_TIMER
 969
 970 // Sleep for nSecs seconds. Attempt a Windows implementation using timers.
 971 static bool gs_inTimer = FALSE;
 972
 973 class wxSleepTimer : public wxTimer
 974 {
 975 public:
 976     virtual void Notify()
 977     {
 978         gs_inTimer = FALSE;
 979         Stop();
 980     }
 981 };
 982
 983 static wxTimer *wxTheSleepTimer = NULL;
 984
 985 void wxUsleep(unsigned long milliseconds)
 986 {
 987 #ifdef __WIN32__
 988     ::Sleep(milliseconds);
 989 #else // !Win32
 990     if (gs_inTimer)
 991         return;
 992
 993     wxTheSleepTimer = new wxSleepTimer;
 994     gs_inTimer = TRUE;
 995     wxTheSleepTimer->Start(milliseconds);
 996     while (gs_inTimer)
 997     {
 998         if (wxTheApp->Pending())
 999             wxTheApp->Dispatch();
1000     }
1001     delete wxTheSleepTimer;
1002     wxTheSleepTimer = NULL;
1003 #endif // Win32/!Win32
1004 }
1005
1006 void wxSleep(int nSecs)
1007 {
1008     if (gs_inTimer)
1009         return;
1010
1011     wxTheSleepTimer = new wxSleepTimer;
1012     gs_inTimer = TRUE;
1013     wxTheSleepTimer->Start(nSecs*1000);
1014     while (gs_inTimer)
1015     {
1016         if (wxTheApp->Pending())
1017             wxTheApp->Dispatch();
1018     }
1019     delete wxTheSleepTimer;
1020     wxTheSleepTimer = NULL;
1021 }
1022
1023 // Consume all events until no more left
1024 void wxFlushEvents()
1025 {
1026 //  wxYield();
1027 }
1028
1029 #endif // wxUSE_TIMER
1030
1031 #elif defined(__WIN32__) // wxUSE_GUI
1032
1033 void wxUsleep(unsigned long milliseconds)
1034 {
1035     ::Sleep(milliseconds);
1036 }
1037
1038 void wxSleep(int nSecs)
1039 {
1040     wxUsleep(1000*nSecs);
1041 }
1042
1043 #endif // wxUSE_GUI/!wxUSE_GUI
1044 #endif // __WXMICROWIN__
1045
1046 // ----------------------------------------------------------------------------
1047 // deprecated (in favour of wxLog) log functions
1048 // ----------------------------------------------------------------------------
1049
1050 #if wxUSE_GUI
1051
1052 // Output a debug mess., in a system dependent fashion.
1053 #ifndef __WXMICROWIN__
1054 void wxDebugMsg(const wxChar *fmt ...)
1055 {
1056   va_list ap;
1057   static wxChar buffer[512];
1058
1059   if (!wxTheApp->GetWantDebugOutput())
1060     return ;
1061
1062   va_start(ap, fmt);
1063
1064   wvsprintf(buffer,fmt,ap) ;
1065   OutputDebugString((LPCTSTR)buffer) ;
1066
1067   va_end(ap);
1068 }
1069
1070 // Non-fatal error: pop up message box and (possibly) continue
1071 void wxError(const wxString& msg, const wxString& title)
1072 {
1073   wxSprintf(wxBuffer, wxT("%s\nContinue?"), WXSTRINGCAST msg);
1074   if (MessageBox(NULL, (LPCTSTR)wxBuffer, (LPCTSTR)WXSTRINGCAST title,
1075              MB_ICONSTOP | MB_YESNO) == IDNO)
1076     wxExit();
1077 }
1078
1079 // Fatal error: pop up message box and abort
1080 void wxFatalError(const wxString& msg, const wxString& title)
1081 {
1082   wxSprintf(wxBuffer, wxT("%s: %s"), WXSTRINGCAST title, WXSTRINGCAST msg);
1083   FatalAppExit(0, (LPCTSTR)wxBuffer);
1084 }
1085 #endif // __WXMICROWIN__
1086
1087 // ----------------------------------------------------------------------------
1088 // functions to work with .INI files
1089 // ----------------------------------------------------------------------------
1090
1091 // Reading and writing resources (eg WIN.INI, .Xdefaults)
1092 #if wxUSE_RESOURCES
1093 bool wxWriteResource(const wxString& section, const wxString& entry, const wxString& value, const wxString& file)
1094 {
1095   if (file != wxT(""))
1096 // Don't know what the correct cast should be, but it doesn't
1097 // compile in BC++/16-bit without this cast.
1098 #if !defined(__WIN32__)
1099     return (WritePrivateProfileString((const char*) section, (const char*) entry, (const char*) value, (const char*) file) != 0);
1100 #else
1101     return (WritePrivateProfileString((LPCTSTR)WXSTRINGCAST section, (LPCTSTR)WXSTRINGCAST entry, (LPCTSTR)value, (LPCTSTR)WXSTRINGCAST file) != 0);
1102 #endif
1103   else
1104     return (WriteProfileString((LPCTSTR)WXSTRINGCAST section, (LPCTSTR)WXSTRINGCAST entry, (LPCTSTR)WXSTRINGCAST value) != 0);
1105 }
1106
1107 bool wxWriteResource(const wxString& section, const wxString& entry, float value, const wxString& file)
1108 {
1109     wxString buf;
1110     buf.Printf(wxT("%.4f"), value);
1111
1112     return wxWriteResource(section, entry, buf, file);
1113 }
1114
1115 bool wxWriteResource(const wxString& section, const wxString& entry, long value, const wxString& file)
1116 {
1117     wxString buf;
1118     buf.Printf(wxT("%ld"), value);
1119
1120     return wxWriteResource(section, entry, buf, file);
1121 }
1122
1123 bool wxWriteResource(const wxString& section, const wxString& entry, int value, const wxString& file)
1124 {
1125     wxString buf;
1126     buf.Printf(wxT("%d"), value);
1127
1128     return wxWriteResource(section, entry, buf, file);
1129 }
1130
1131 bool wxGetResource(const wxString& section, const wxString& entry, wxChar **value, const wxString& file)
1132 {
1133     static const wxChar defunkt[] = wxT("$$default");
1134     if (file != wxT(""))
1135     {
1136         int n = GetPrivateProfileString((LPCTSTR)WXSTRINGCAST section, (LPCTSTR)WXSTRINGCAST entry, (LPCTSTR)defunkt,
1137                 (LPTSTR)wxBuffer, 1000, (LPCTSTR)WXSTRINGCAST file);
1138         if (n == 0 || wxStrcmp(wxBuffer, defunkt) == 0)
1139             return FALSE;
1140     }
1141     else
1142     {
1143         int n = GetProfileString((LPCTSTR)WXSTRINGCAST section, (LPCTSTR)WXSTRINGCAST entry, (LPCTSTR)defunkt,
1144                 (LPTSTR)wxBuffer, 1000);
1145         if (n == 0 || wxStrcmp(wxBuffer, defunkt) == 0)
1146             return FALSE;
1147     }
1148     if (*value) delete[] (*value);
1149     *value = copystring(wxBuffer);
1150     return TRUE;
1151 }
1152
1153 bool wxGetResource(const wxString& section, const wxString& entry, float *value, const wxString& file)
1154 {
1155     wxChar *s = NULL;
1156     bool succ = wxGetResource(section, entry, (wxChar **)&s, file);
1157     if (succ)
1158     {
1159         *value = (float)wxStrtod(s, NULL);
1160         delete[] s;
1161         return TRUE;
1162     }
1163     else return FALSE;
1164 }
1165
1166 bool wxGetResource(const wxString& section, const wxString& entry, long *value, const wxString& file)
1167 {
1168     wxChar *s = NULL;
1169     bool succ = wxGetResource(section, entry, (wxChar **)&s, file);
1170     if (succ)
1171     {
1172         *value = wxStrtol(s, NULL, 10);
1173         delete[] s;
1174         return TRUE;
1175     }
1176     else return FALSE;
1177 }
1178
1179 bool wxGetResource(const wxString& section, const wxString& entry, int *value, const wxString& file)
1180 {
1181     wxChar *s = NULL;
1182     bool succ = wxGetResource(section, entry, (wxChar **)&s, file);
1183     if (succ)
1184     {
1185         *value = (int)wxStrtol(s, NULL, 10);
1186         delete[] s;
1187         return TRUE;
1188     }
1189     else return FALSE;
1190 }
1191 #endif // wxUSE_RESOURCES
1192
1193 // ---------------------------------------------------------------------------
1194 // helper functions for showing a "busy" cursor
1195 // ---------------------------------------------------------------------------
1196
1197 static HCURSOR gs_wxBusyCursor = 0;     // new, busy cursor
1198 static HCURSOR gs_wxBusyCursorOld = 0;  // old cursor
1199 static int gs_wxBusyCursorCount = 0;
1200
1201 extern HCURSOR wxGetCurrentBusyCursor()
1202 {
1203     return gs_wxBusyCursor;
1204 }
1205
1206 // Set the cursor to the busy cursor for all windows
1207 void wxBeginBusyCursor(wxCursor *cursor)
1208 {
1209     if ( gs_wxBusyCursorCount++ == 0 )
1210     {
1211         gs_wxBusyCursor = (HCURSOR)cursor->GetHCURSOR();
1212 #ifndef __WXMICROWIN__
1213         gs_wxBusyCursorOld = ::SetCursor(gs_wxBusyCursor);
1214 #endif
1215     }
1216     //else: nothing to do, already set
1217 }
1218
1219 // Restore cursor to normal
1220 void wxEndBusyCursor()
1221 {
1222     wxCHECK_RET( gs_wxBusyCursorCount > 0,
1223                  wxT("no matching wxBeginBusyCursor() for wxEndBusyCursor()") );
1224
1225     if ( --gs_wxBusyCursorCount == 0 )
1226     {
1227 #ifndef __WXMICROWIN__
1228         ::SetCursor(gs_wxBusyCursorOld);
1229 #endif
1230         gs_wxBusyCursorOld = 0;
1231     }
1232 }
1233
1234 // TRUE if we're between the above two calls
1235 bool wxIsBusy()
1236 {
1237   return gs_wxBusyCursorCount > 0;
1238 }
1239
1240 // Check whether this window wants to process messages, e.g. Stop button
1241 // in long calculations.
1242 bool wxCheckForInterrupt(wxWindow *wnd)
1243 {
1244     wxCHECK( wnd, FALSE );
1245
1246     MSG msg;
1247     while ( ::PeekMessage(&msg, GetHwndOf(wnd), 0, 0, PM_REMOVE) )
1248     {
1249         ::TranslateMessage(&msg);
1250         ::DispatchMessage(&msg);
1251     }
1252
1253     return TRUE;
1254 }
1255
1256 // MSW only: get user-defined resource from the .res file.
1257 // Returns NULL or newly-allocated memory, so use delete[] to clean up.
1258
1259 #ifndef __WXMICROWIN__
1260 wxChar *wxLoadUserResource(const wxString& resourceName, const wxString& resourceType)
1261 {
1262     HRSRC hResource = ::FindResource(wxGetInstance(), resourceName, resourceType);
1263     if ( hResource == 0 )
1264         return NULL;
1265
1266     HGLOBAL hData = ::LoadResource(wxGetInstance(), hResource);
1267     if ( hData == 0 )
1268         return NULL;
1269
1270     wxChar *theText = (wxChar *)::LockResource(hData);
1271     if ( !theText )
1272         return NULL;
1273
1274     // Not all compilers put a zero at the end of the resource (e.g. BC++ doesn't).
1275     // so we need to find the length of the resource.
1276     int len = ::SizeofResource(wxGetInstance(), hResource);
1277     wxChar  *s = new wxChar[len+1];
1278     wxStrncpy(s,theText,len);
1279     s[len]=0;
1280
1281     // wxChar *s = copystring(theText);
1282
1283     // Obsolete in WIN32
1284 #ifndef __WIN32__
1285     UnlockResource(hData);
1286 #endif
1287
1288     // No need??
1289     //  GlobalFree(hData);
1290
1291     return s;
1292 }
1293 #endif // __WXMICROWIN__
1294
1295 // ----------------------------------------------------------------------------
1296 // get display info
1297 // ----------------------------------------------------------------------------
1298
1299 // See also the wxGetMousePosition in window.cpp
1300 // Deprecated: use wxPoint wxGetMousePosition() instead
1301 void wxGetMousePosition( int* x, int* y )
1302 {
1303     POINT pt;
1304     GetCursorPos( & pt );
1305     if ( x ) *x = pt.x;
1306     if ( y ) *y = pt.y;
1307 };
1308
1309 // Return TRUE if we have a colour display
1310 bool wxColourDisplay()
1311 {
1312 #ifdef __WXMICROWIN__
1313     // MICROWIN_TODO
1314     return TRUE;
1315 #else
1316     // this function is called from wxDC ctor so it is called a *lot* of times
1317     // hence we optimize it a bit but doign the check only once
1318     //
1319     // this should be MT safe as only the GUI thread (holding the GUI mutex)
1320     // can call us
1321     static int s_isColour = -1;
1322
1323     if ( s_isColour == -1 )
1324     {
1325         ScreenHDC dc;
1326         int noCols = ::GetDeviceCaps(dc, NUMCOLORS);
1327
1328         s_isColour = (noCols == -1) || (noCols > 2);
1329     }
1330
1331     return s_isColour != 0;
1332 #endif
1333 }
1334
1335 // Returns depth of screen
1336 int wxDisplayDepth()
1337 {
1338     ScreenHDC dc;
1339     return GetDeviceCaps(dc, PLANES) * GetDeviceCaps(dc, BITSPIXEL);
1340 }
1341
1342 // Get size of display
1343 void wxDisplaySize(int *width, int *height)
1344 {
1345 #ifdef __WXMICROWIN__
1346     RECT rect;
1347     HWND hWnd = GetDesktopWindow();
1348     ::GetWindowRect(hWnd, & rect);
1349
1350     if ( width )
1351         *width = rect.right - rect.left;
1352     if ( height )
1353         *height = rect.bottom - rect.top;
1354 #else // !__WXMICROWIN__
1355     ScreenHDC dc;
1356
1357     if ( width )
1358         *width = ::GetDeviceCaps(dc, HORZRES);
1359     if ( height )
1360         *height = ::GetDeviceCaps(dc, VERTRES);
1361 #endif // __WXMICROWIN__/!__WXMICROWIN__
1362 }
1363
1364 void wxDisplaySizeMM(int *width, int *height)
1365 {
1366 #ifdef __WXMICROWIN__
1367     // MICROWIN_TODO
1368     if ( width )
1369         *width = 0;
1370     if ( height )
1371         *height = 0;
1372 #else
1373     ScreenHDC dc;
1374
1375     if ( width )
1376         *width = ::GetDeviceCaps(dc, HORZSIZE);
1377     if ( height )
1378         *height = ::GetDeviceCaps(dc, VERTSIZE);
1379 #endif
1380 }
1381
1382 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
1383 {
1384 #if defined(__WIN16__) || defined(__WXMICROWIN__)
1385     *x = 0; *y = 0;
1386     wxDisplaySize(width, height);
1387 #else
1388     // Determine the desktop dimensions minus the taskbar and any other
1389     // special decorations...
1390     RECT r;
1391
1392     SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
1393     if (x)      *x = r.left;
1394     if (y)      *y = r.top;
1395     if (width)  *width = r.right - r.left;
1396     if (height) *height = r.bottom - r.top;
1397 #endif
1398 }
1399
1400 // ---------------------------------------------------------------------------
1401 // window information functions
1402 // ---------------------------------------------------------------------------
1403
1404 wxString WXDLLEXPORT wxGetWindowText(WXHWND hWnd)
1405 {
1406     wxString str;
1407
1408     if ( hWnd )
1409     {
1410         int len = GetWindowTextLength((HWND)hWnd) + 1;
1411         ::GetWindowText((HWND)hWnd, str.GetWriteBuf(len), len);
1412         str.UngetWriteBuf();
1413     }
1414
1415     return str;
1416 }
1417
1418 wxString WXDLLEXPORT wxGetWindowClass(WXHWND hWnd)
1419 {
1420     wxString str;
1421
1422     // MICROWIN_TODO
1423 #ifndef __WXMICROWIN__
1424     if ( hWnd )
1425     {
1426         int len = 256; // some starting value
1427
1428         for ( ;; )
1429         {
1430             int count = ::GetClassName((HWND)hWnd, str.GetWriteBuf(len), len);
1431
1432             str.UngetWriteBuf();
1433             if ( count == len )
1434             {
1435                 // the class name might have been truncated, retry with larger
1436                 // buffer
1437                 len *= 2;
1438             }
1439             else
1440             {
1441                 break;
1442             }
1443         }
1444     }
1445 #endif // !__WXMICROWIN__
1446
1447     return str;
1448 }
1449
1450 WXWORD WXDLLEXPORT wxGetWindowId(WXHWND hWnd)
1451 {
1452 #ifndef __WIN32__
1453     return (WXWORD)GetWindowWord((HWND)hWnd, GWW_ID);
1454 #else // Win32
1455     return (WXWORD)GetWindowLong((HWND)hWnd, GWL_ID);
1456 #endif // Win16/32
1457 }
1458
1459 #endif // wxUSE_GUI
1460
1461 #if wxUSE_GUI
1462
1463 // ----------------------------------------------------------------------------
1464 // Metafile helpers
1465 // ----------------------------------------------------------------------------
1466
1467 extern void PixelToHIMETRIC(LONG *x, LONG *y)
1468 {
1469     ScreenHDC hdcRef;
1470
1471     int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE),
1472         iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE),
1473         iWidthPels = GetDeviceCaps(hdcRef, HORZRES),
1474         iHeightPels = GetDeviceCaps(hdcRef, VERTRES);
1475
1476     *x *= (iWidthMM * 100);
1477     *x /= iWidthPels;
1478     *y *= (iHeightMM * 100);
1479     *y /= iHeightPels;
1480 }
1481
1482 extern void HIMETRICToPixel(LONG *x, LONG *y)
1483 {
1484     ScreenHDC hdcRef;
1485
1486     int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE),
1487         iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE),
1488         iWidthPels = GetDeviceCaps(hdcRef, HORZRES),
1489         iHeightPels = GetDeviceCaps(hdcRef, VERTRES);
1490
1491     *x *= iWidthPels;
1492     *x /= (iWidthMM * 100);
1493     *y *= iHeightPels;
1494     *y /= (iHeightMM * 100);
1495 }
1496
1497 #endif // wxUSE_GUI
1498
1499 #ifdef __WXMICROWIN__
1500 int wxGetOsVersion(int *majorVsn, int *minorVsn)
1501 {
1502     // MICROWIN_TODO
1503     if (majorVsn) *majorVsn = 0;
1504     if (minorVsn) *minorVsn = 0;
1505     return wxUNIX;
1506 }
1507 #endif // __WXMICROWIN__
1508
1509 // ----------------------------------------------------------------------------
1510 // Win32 codepage conversion functions
1511 // ----------------------------------------------------------------------------
1512
1513 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
1514
1515 // wxGetNativeFontEncoding() doesn't exist neither in wxBase nor in wxUniv
1516 #if wxUSE_GUI && !defined(__WXUNIVERSAL__)
1517
1518 #include "wx/fontmap.h"
1519
1520 // VZ: the new version of wxCharsetToCodepage() is more politically correct
1521 //     and should work on other Windows versions as well but the old version is
1522 //     still needed for !wxUSE_FONTMAP || !wxUSE_GUI case
1523
1524 extern long wxEncodingToCodepage(wxFontEncoding encoding)
1525 {
1526     // translate encoding into the Windows CHARSET
1527     wxNativeEncodingInfo natveEncInfo;
1528     if ( !wxGetNativeFontEncoding(encoding, &natveEncInfo) )
1529         return -1;
1530
1531     // translate CHARSET to code page
1532     CHARSETINFO csetInfo;
1533     if ( !::TranslateCharsetInfo((DWORD *)(DWORD)natveEncInfo.charset,
1534                                  &csetInfo,
1535                                  TCI_SRCCHARSET) )
1536     {
1537         wxLogLastError(_T("TranslateCharsetInfo(TCI_SRCCHARSET)"));
1538
1539         return -1;
1540     }
1541
1542     return csetInfo.ciACP;
1543 }
1544
1545 #if wxUSE_FONTMAP
1546
1547 extern long wxCharsetToCodepage(const wxChar *name)
1548 {
1549     // first get the font encoding for this charset
1550     if ( !name )
1551         return -1;
1552
1553     wxFontEncoding enc = wxTheFontMapper->CharsetToEncoding(name, FALSE);
1554     if ( enc == wxFONTENCODING_SYSTEM )
1555         return -1;
1556
1557     // the use the helper function
1558     return wxEncodingToCodepage(enc);
1559 }
1560
1561 #endif // wxUSE_FONTMAP
1562
1563 #endif // wxUSE_GUI
1564
1565 // include old wxCharsetToCodepage() by OK if needed
1566 #if !wxUSE_GUI || !wxUSE_FONTMAP
1567
1568 #include "wx/msw/registry.h"
1569
1570 // this should work if Internet Exploiter is installed
1571 extern long wxCharsetToCodepage(const wxChar *name)
1572 {
1573     if (!name)
1574         return GetACP();
1575
1576     long CP=-1;
1577
1578     wxString cn(name);
1579     do {
1580         wxString path(wxT("MIME\\Database\\Charset\\"));
1581         path += cn;
1582         wxRegKey key(wxRegKey::HKCR, path);
1583
1584         if (!key.Exists()) break;
1585
1586         // two cases: either there's an AliasForCharset string,
1587         // or there are Codepage and InternetEncoding dwords.
1588         // The InternetEncoding gives us the actual encoding,
1589         // the Codepage just says which Windows character set to
1590         // use when displaying the data.
1591         if (key.HasValue(wxT("InternetEncoding")) &&
1592             key.QueryValue(wxT("InternetEncoding"), &CP)) break;
1593
1594         // no encoding, see if it's an alias
1595         if (!key.HasValue(wxT("AliasForCharset")) ||
1596             !key.QueryValue(wxT("AliasForCharset"), cn)) break;
1597     } while (1);
1598
1599     return CP;
1600 }
1601
1602 #endif // !wxUSE_GUI || !wxUSE_FONTMAP
1603
1604 #endif // Win32
1605