Microsoft KB Archive/113679

DOCERR: Errors in Win32s Compatibility

PSS ID Number: Q113679 Article last modified on 05-10-1996

1.20 1.25a

WINDOWS

= SUMMARY =

The following Win32 APIs are listed in the Win32 Programmer’s Reference as being supported under Win32s. This is incorrect. These Win32 APIs are not supported under Win32s:


 * mouse_event

The following Win32 APIs are not listed in the Win32 Programmer’s Reference as being supported under Win32s. This is incorrect. These Win32 APIs are supported under Win32s:

FlushInstructionCache GetFileInformationByHandle MoveMemory TlsAlloc RegCreateKeyEx RegOpenKeyEx RegSetValueEx WNetAddConnection WNetGetConnection

In addition, all of the BS_ button styles are marked as not supported under Win32s. However, Win32s supports all of the button styles that Windows 3.1 supports.

= MORE INFORMATION =

The following Win32 APIs and CRT (C Run-time) routines are supported under Win32s, with the restrictions noted.

= Function Associated Restriction =

CreateFile FILE_FLAG_NO_BUFFERING, FILE_FLAG_WRITE_THROUGH, FILE_FLAG_OVERLAPPED, FILE_DELETE_ON_CLOSE, and the security flags are not supported. Passing dwShareMode=0 opens the file in compatibility mode, not in exclusive mode. ————————————————————————— CreateFileMapping SEC_COMMIT is supported, but not SEC_IMAGE, SEC_NOCACHE or SEC_RESERVE. The size of named shared memory is limited by Windows memory. ————————————————————————— CreateDIBitmap DIB_PAL_INDICES CreateDIBPatternBrush DIB_PAL_PHYSINDICES CreateDIBPatternBrushPt DIB_PAL_LOGINDICES are not supported. GetDIBits SetDIBits SetDIBitsToDevice StretchDIBits ————————————————————————— CreatePolyPolygonRgn The polygon must be closed. ————————————————————————— CreateProcess Handle inheritance is not supported. Only creation flags supported are DEBUG_PROCESS and DEBUG_ONLY_THIS_PROCESS. The only priority supported is NORMAL_PRIORITY_CLASS. The security attributes are ignored. ————————————————————————— GetFileInformationByHandle ftCreationTime, ftLastAccessTime, dwVolumeSerialNumber, nFileIndexHigh, and nFileIndexLow are all 0. ————————————————————————— GetFileTime Only lpLastWriteTime is supported. SetFileTime ————————————————————————— GetPrivateProfileString lpszSection parameter cannot be NULL. GetProfileString ————————————————————————— GetSystemMetrics SM_CMOUSEBUTTONS is not supported. ————————————————————————— GetSystemPaletteEntries The fourth parameter cannot be NULL. ————————————————————————— GetVolumeInformation Volume ID is not supported. ————————————————————————— OpenProcess Settings for fdwAccess and fInherit are ignored. In the implementation, fdwAccess=PROCESS_ALL_ACCESS and fInherit=TRUE. ————————————————————————— PeekMessage hWnd cannot be -1. ————————————————————————— PlaySound SND_ALIAS, SND_FILENAME, and SND_NOWAIT are not supported. ————————————————————————— RegSetValueEx Only supports the REG_SZ entries. ————————————————————————— SetClipboardData Use only a global handle. ————————————————————————— SetWindowsHookEx dwThreadId parameter is ignored. ————————————————————————— signal SIGBREAK is not supported. ————————————————————————— spawn P_WAIT is not supported. ————————————————————————— WaitForDebugEvent Any dwTimeOut other than 0 is treated as INFINITE. ————————————————————————— WNetAddConnection Password cannot be NULL, but can be &quot;&quot;. ===========================================================================

Additional reference words: 1.20 KBCategory: kbref kbdocerr KBSubcategory: W32s ============================================================================= Copyright Microsoft Corporation 1996.