Win32s 1.30a Bug List at the Time of Its Release

• Microsoft Win32s version 1.30a

SUMMARY

This article lists the known bugs in Win32s version 1.30a at the time of its release.

MORE INFORMATION

- Incorrect context at EXIT_PROCESS_DEBUG_EVENT.

- DEBUG_EVENT.RIP_INFO not supported.

- Progman gets restored when debugger app exits.

- Problem with journaling hooks on Win32s when using MSTest.

- OLE: need try/except at 32-bit entrypoints.

- EXCEPTION_RECORD: The # of params and Info array always zero.

- Frame: Access Violation in PackFindData@8 (FindFirstFile looking

   for arrow.pcx).

   not output the document.

- CVW32s: Machine deadlock w/debugger, div0.exe & FatalAppExit.

- CVW32s: Ubrowse.exe runs on NT, but not Win32s example.

- cvw/win32s: restart of mfc app blows.

- cvw/w32s: exception; procterm; l; g; async stop doesn't stop.

- EM_GETWORDBREAKPROC return code incorrect. If an application sends

   the EM_GETWORDBREAKPROC message to an edit control, it will receive
   the address of a 32->16 callback thunk with no code on the other
   end of the stub.

- The DDE message thunks force the fAckReq bit to 1 if WM_DDE_DATA

   is sent with it set to 0. This forces the client to post the
   WM_DDE_ACK message so that the thunk layer can know when to free
   up data allocated for thunking the WM_DDE_DATA message. The server
   isn't expecting the ACK in this case. The thunk layer will
   recognize the forced ACK, however the code to consume it has not
   been implemented yet. Problems so far unseen but still possible.

- Win32's CreateFile() opens files in cooked mode as opposed to raw mode.

- Some time functions, such as ctime(), return values that are off by

   nine hours. This happens when the TZ environment variable is not
   defined. When TZ is defined and set to 0, these time functions return
   the correct value. The time offset is determined by the TZ environment
   variable, and when it is not defined a default of -9 is used.

   of memory the second time.

   with error code 87 instead of error code 2 (ERROR_FILE_NOT_FOUND).
   Win32s is unable to determine from the return value provided by
   Windows if the call failed due to the file not being there.

- MFC Speakn sample won't run on Win32s.

- UT Diagram in Programmers Reference is incorrect.

- CRT: getdcwd/getcwd does not work on Win32s.

- Exception in DLL termination routine causes the system to quit.

- PlayMetaFileRecord/EnumMetaFile contains incorrect lpHTable.

- Windbg assertion on HOST machine.

- The .pif files are not supported.

- PlaySound() with SND_RESOURCE.

- File mapping rounded to a whole number of pages, a multiple of 256

   instead of 4096. The workaround is to use SetFilePointer() and
   SetEndOfFile() after closing the mapping handles, but before closing
   the file.

- Microsoft Excel bapco MSTest script does not run to completion.

- Dynamic dialog boxes under Win32s. An ANSI Win32 application loads a

   dialog box resource directly from its executable via LoadResource().
   Traverses the dialog box template and renders its controls into another
   dialog box. The application then displays the dialog box which
   re-positions some of its controls during WM_INITDIALOG. In Windows NT,
   the controls rearrange as intended whereas in Win32s, they appear
   misaligned by 50 pixels or so.

   Windows-based applications.

   netbios VxD expects the memory to be allocated from the Win31 memory
   space to lock that specific memory page. If the memory is allocated from
   somewhere else such as from the Win32s sparse area, it will fail. In
   this specific case, allocate a buffer using GlobalAlloc(), memcpy in it
   the data retrieved, and call Netbios.

   not placing the correct value for this field into the buffer.

- Registry functions return incorrect result code. Registry functions

   such as RegCreateKey() return incorrect results upon failure. The
   Windows 3.1 return code is returned, not the Windows NT return code.
   The functions that return correct results are: RegQueryValueA() and
   RegQueryValueExA()

- Bad handles from CreateProcess16() if the child doesn't yield.

- GlobalReAlloc(x,y,GMEM_MOVEABLE) returns wrong handle type.

- GMEM_SHARE memory must be freed explicitly.

- RestartThread() writes to debuggee stack.

- The memory for CallBack frames is allocated once. The allocation

   size is 64K. In most cases this is too large, and in some
   extreme cases this 64K may be exhausted.

   Win32s. Under Windows NT, all failures are handled correctly. For
   example, directory already exists, no space left on device, and so on.
   Under Win32s, all errors are handled identically (error #5, "Access is
   denied").

   SetCurrentDirectory() works differently under Windows NT 3.5 and
   Win32s. For example, if there is no floppy disk in drive B, and
   SetCurrentDirectory() is called with "b:\", under Windows NT error
   #21 is returned, "The device is not ready," while under Win32s, error
   #161, "The specified path is invalid" is returned.

- FindText() leaks memory and may cause a general protection (GP) fault.

- spawnl doesn't pass parameters to an MS-DOS-based application.

- Win32s does not support forwarded exports.

- module management APIs missing ANSI to OEM translation.

- PlaySound() w/ SND_NOWAIT.

- FormatMessage() doesn't set last error.

- Createfile(), when used on a write-protected floppy disk, fails.

   GetLastError() returns 2 instead of 19.

- Setup doesn't create backup files for some of the OLE files.

- winhlp32:Compare macro does not display windows side by side.

- MEASUREITEMSTRUCT and DRAWITEMSTRUCT are missing fields in menus.

- HeapValidate() fails on a new heap. HeapValidate() is not supported

   in the retail version of Win32s. GetLastError() returns
   ERROR_CALL_NOT_IMPLEMENTED. HeapValidate() is supported only in the
   debug version of Win32s and in both the retail and debug versions of
   Windows NT.

   Other new heap APIs that are not supported in Win32s are:

   HeapCompact()
   HeapCreateTags()
   HeapExtend()
   HeapLock()
   HeapQueryTag()
   HeapSummary()
   HeapUnlock()
   HeapUsage()
   HeapWalk()

   All these APIs, including HeapValidate, are documented as not
   supported on Win32s and Windows 95.

- winhlp32:PopupContext macro produces incorrect error message.

- winhlp32: PC macro with non-help file.

- winhlp32:PopupID with non-existing context string.

- A file opened as GENERIC_READ only can still be written to.

- winhlp32 doesn't play .avi files.

- winhlp32:new highlight feature is not consistent.

- winhlp32:System error on write protected medium.

- winhlp32:bitmap in Shed.hlp does not print correctly.

- winhlp32:winword produces error when attempting to print from a

   secondary window.

- MPLAY32.EXE of Windows NT 3.1 does not run on Win32s.

- winhlp32:Window title does not change back.

- winhlp32:kicked out of help after opening non-helpfile.

- SearchPath() doesn't find file if Path is empty. NULL for lpszPath

   is fine, but an lpszPath = "" will not work the same as on Windows NT.

- VerLanguageNameA() not exported by version.dll.