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This is the changelog for ReactOS™ version 0.3.4 (released 22 January, 2008), an open-source operating system designed to be binary executable- and device driver-compatible with Microsoft™ Windows NT™ and subsequent Microsoft operating systems such as Windows 2000™ and Windows XP™. ReactOS is written by the ReactOS development team, and the last previous version of ReactOS was version 0.3.3 (released 12 September, 2007).



Generic 0.3.4 Changes

  • Added more entries to machine.inf to install ACPI thermal zones and lids (Cameron Gutman)
  • LiveCDs now use the SOS boot screen (Cameron Gutman, bug #2658)
  • XML compliance fixes for the .rbuild files (Marc Piulachs, bug #2649)
  • Define default strings in the general "version.rc" resource file, which shouldn't be overwritten by applications. (Colin Finck)
  • Update icons for Shell32, Setupapi. (Dmitry Chapyshev)
  • Se fixes related to cygwin. (Art Yerkes)
  • Fixed parsing of registry key names with double reverse solidus. (Art Yerkes)
  • Handle recvfrom with a thrown-away address, and properly handle exception locking userland buffers in afd packet path (Art Yerkes)
  • Updated Mingw headers to version 3.13 (Samuel Serapión, bug #2736)
  • Create the directory ROS_TEMPORARY if it does not exist, when building ReactOS (Colin Finck)
  • Add support to build multiple architectures simultaneously (Hervé Poussineau)
  • Do not use host headers anymore when building target executables/libraries (Hervé Poussineau)
  • Fix XBox boot (still no support for USB keyboard/mouse) (Hervé Poussineau)
  • Enable/disable debug messages dynamically in user mode DLLs and some drivers (Hervé Poussineau)
  • Display a simple bootlogo, instead of a black screen if /SOS option is not provided (Hervé Poussineau)
  • Create user profile if needed (Hervé Poussineau)
  • New i8042prt driver, plug-and-play compliant (Hervé Poussineau)


  • Change the file names of the Catalan translations from "ca-CA" to "ca-ES", thanks to Marc Piulachs for noticing this (Colin Finck, bug #2662)
  • Make the Shell32 translations consistent for all languages (Colin Finck)
  • Fixed punctuation in French translations (Pierre Schweitzer)
  • Added/updated French translations for 3dtext, Access, Appwiz.cpl, Blankscr, Butterflies, Calc, Cmd, Control, Cylfrac, Desk.cpl, Deskadp, Deskmon, Downloader, Eventvwr, Find, Intl, Input, Joy, Liccpa, Logon, Magnify, Main, Matrix, Mmsys, Mstsc, Ncpa.cpl, Newdev, Powercfg, Regedit, Scrnsave, Servman, Shell32, Solitaire, Starfield, Sysdm, Syssetup, Systeminfo, Taskmgr, Telephon, WineMine, Write (Pierre Schweitzer, bugs #2530, #2531, #2680, #2747, #2766)
  • Added/updated Catalan translations for Cacls, Calc, Charmap, Control, Find, Logoff, Mmc, More, Msconfig, Mstsc, Solitaire, WineMine (Marc Tormo i Bochaca, bugs #2580, #2625, #2626, #2647, #2651, #2652, #2653, #2654, #2655, #2656, #2831)
  • Added/updated English and German translations for Explorer, More, Shell32, Syssetup, Usetup (Colin Finck)
  • Added/updated Lithuanian translations for 3dtext, Butterflies, Charmap, Control, Cylfrac, Find, Logoff, Logon, Matrix, More, Notepad, Scrnsave, Shutdown, Sndvol32, Solitaire, Starfield, WineMine (Vytis Girdžijauskas, bugs #2532, #2712, #2869)
  • Added/updated Slovak translations for 3dtext, Cylfrac, Desk.cpl, Deskadp, Deskmon, Explorer, Logon, Matrix, Scrnsave, shell32, Slayer, Solitaire, Starfield, Sysdm.cpl, Timedate.cpl (Mario Kacmar, bug #2551, #2919)
  • Added/updated Ukrainian translations for Access.cpl, Butterflies, Clb, Cmd, Comctl32.dll, Comdlg32.dll, Control, Ctm, Cylfrac, Desk.cpl, Deskadp, Deskmon, Devmgr, Downloader, Explorer, Find, FreeLDR, Input.dll, Intl.cpl, Logoff, Logon, Main.cpl, Matrix, Mazescr, Mmsys.cpl, Msconfig, Ncpa.cpl, netid, Newdev, Packmgr, Powercfg.cpl, Rasdlg, Regedit, Scrnsave, Servman, Shell32, Shutdown, Starfield, Sysdm.cpl, Syssetup, Tapiui, usetup, Vmwinst, WineMine, Write (Artem Reznikov, bugs #2534, #2638, #2643, #2661, #2692, #2696, #2697, #2699, #2708, #2731, #2832, #2836, #2844, #2854, #2882, #2894, #2923, #2942, #2943, #2958)
  • Added/updated Russian translations for Logoff, Ncpa.cpl (Artem Reznikov, bug #2534)
  • Added/updated Spanish translations for appwiz, Cylfrac, desk, devmgr, Fontview, joy, liccpa, main, Magnify, Matrix, ncpa, netid, newdev, "reactos" (Setup tool under Windows), powercfg, rasapi, regedit, Scrnsave, serialui, servman, shell32, Sndvol32, Starfield, sysdm, syssetup, telephon, timedate, winemine (Javier Remacha, bugs #2669, #2863, #2920)
  • Added Ukrainian translations for Access.cpl, Eventvwr, Format, Ipconfig, More, Regsvr32, WinHelp (Rostislav Zabolotny, bugs #2677, #2685, #2686, #2753, #2754, #2764, #2765)
  • Added a Traditional Chinese translation for Cacls (Chaoming Tseng, bug #2687)
  • Added/updated Italian translations for Access.cpl, Appwiz.cpl, Charmap, console, Desk.cpl, Deskmon, Eventvwr, Logon, Main.cpl, Mmc, Ncpa.cpl, netid, Newdev, Powercfg.cpl, Shell32, Solitaire, Sysdm.cpl, Telephon.cpl, usetup, WinHelp (Paolo Devoti, bugs #2528, #2727, #2867)
  • Added/updated Bulgarian translations for 3dtext, Access.cpl, Appwiz.cpl, Butterflies, Clb, Cylfrac, Desk.cpl, Deskadp, Deskmon, Eventvwr, Explorer, Fdebug, Find, Format, Input.dll, Intl.cpl, Ipconfig, Joy, Liccpa, Logoff, Logon, Main.cpl, Mmsys, More, Mpr, Msgina, mstsc, Ncpa.cpl, notepad, Powercfg.cpl, Regedit, Rundll32, Scrnsave, Servman, Shell32, Shutdown, Slayer, Solitaire, Starfield, Sysdm.cpl, Syssetup, Taskmgr, Telephon, Timedate.cpl, User32, Userenv, Userinit, usetup, Win32csr, WineMine, Winlogon, winhelp, WordPad (Станев, bugs #2606, #2728, #2837, #2838, #2881, #2957)
  • Added/updated Spanish translation for Explorer, Explorer_new, Eventvwr, Userenv (Marc Piulachs, bugs #2749, #2758)
  • Added Brazilian Portuguese translations for Msconfig, Sndvol32 (Mateus de Lima, bugs #2768, #2771)
  • Added Russian translation for More command line utility (Koshpaev Igor and Dmitry Chapyshev)
  • Fixed Russian translations for Taskmgr, WineMine, Shell32, Syssetup (Dmitry Chapyshev)
  • Added/updated Italian translations for Intl.cpl, Mstsc, Usetup (Gabriel Ilardi, bugs #2628, #2794, #2895)
  • Added/updated Greek translations for appwiz, desk, powercfg (John Adams, bug #2927
  • Added/updated Greek translations for 3dtext, Access.cpl, Comctl32, Desk.cpl, Explorer, find, ipconfig, logoff, logon, Main.cpl, mmc, more, msacm, msconfig, mscutils, mstsc, netid, powercfg, Shell32, shellext, shutdown, sndvol32, Sysdm.cpl, Syssetup, telephon, usetup, winhelp, xcopy (Apostolos Alexiadis, bugs #2464, #2852, #2853, #2884, #2893, #2925)
  • Added German Translations for 3dtext, Appwiz.cpl, Clb, Cylfrac, Deskadp, Deskmon, Eventvwr, Input.dll, Ipconfig, Joy.cpl, Logon, Modemui, Mstsc, Rasapi32, Rasdlg, Scrnsave, Starfield, Tapiui, Telephon, Xcopy (Daniel Reimer)
  • Synched all application Resource files to be up to date to the English ones and updated all fonts to be MS Shell Dlg (Daniel Reimer)
  • Added/updated Italian translations for Find, Logoff, More (, bugs #2713, #2714, #2716)
  • Added/updated Italian translations for Desk.cpl, Msconfig (Carlo Bramini, bugs #2640, #2722)
  • Added Dutch translations for Cylfrac, Logon, Matrix, Scrnsave, Starfield (Joost de Meij, bug #2678)
  • Added Spanish translation for Usetup (Gabriel Ilardi, bug #2890)
  • Added Spanish translation for Find (Grant A. Brady with some fixes by Samuel Serapión, bug #2880)
  • Added Polish translation for 3dtext, access, appwiz, control, desk, eventvwr, find, input, intl, ipconfig, joy, logoff, mmc, mmsys, modemui, more, msconfig, mstsc, ncpa, notepad, powercfg, rasapi32, Rasdlg, regedit, regsvr, servman, shell32, shutdown, sysdm, syssetup, tapiui, telephon, userenv, winemine. (Olaf Siejka, bug #2926, #2935, #2944)

Build Tools

  • Add an "include/host" directory for Host include files (Colin Finck)
  • Correctly define LONG_PTR, ULONG_PTR and SIZE_T in "host/typedefs.h" (Colin Finck)
  • Define WCHAR to "unsigned short" in "host/typedefs.h", so it's always 2 bytes for host tools (Colin Finck)
  • Add a "nls.h" header file for many NLS definitions needed for WIDL and WRC (Colin Finck)
  • Remove a hack, which always defined __i386__ and lead to problems on other host platforms (Colin Finck)
  • Generates files in the intermediate directory instead of the source directory (Hervé Poussineau)
  • Support alternate directory name on the CD-ROM (Hervé Poussineau)
  • Support absolute paths in ROS_INTERMEDIATE and ROS_OUTPUT (Hervé Poussineau, Bug #2518)



  • Add missing definitions of EnumDateFormats. (Eric Kohl)
  • Add missing LPFILTERKEYS and LPTOGGLEKEYS types. (Eric Kohl)


  • Add folder support for msvc7+ solutions and mapping of pch .h files (Gregor Brunmar)
  • Fixed a small bug when displaying the version of binutils (newline where there shouldn't be one). (Peter Ward)
  • Do not use module (name + extension) as default target if installname attribute is present , use the value of it inset. (Marc Piulachs)
  • Metadata enhancement for rbuild and version report (Marc Piulachs)
  • Cleanup the LinkerScript class and use it (Marc Piulachs)
  • Rename 'base' to 'installbase' for CdFile, InstallFile and Bootstrap (Marc Piulachs)
  • Always add _CRT_SECURE_NO_WARNINGS to the preprocessor definition list, when generating MSVC project files, to disable warnings about not using the safe functions introduced in MSVC8 (Colin Finck)
  • Cleanup code, reduce its memory usage (Hervé Poussineau)
  • Add support for MP build (although not working) (Hervé Poussineau)


  • Use "host/typedefs.h" instead of the Windows headers in "wine/unicode.h" and copy some needed definitions from the "winnls.h" (Colin Finck)



  • Use "host/typedefs.h" instead of redefining some types in "winglue.h" (Colin Finck)


  • Use "host/typedefs.h" instead of the Windows headers in "wmctypes.h" (Colin Finck)


  • Use "host/typedefs.h" instead of the Windows headers in "wrctypes.h" and add a "wrcrostypes.h" for all needed definitions from the Windows headers (Colin Finck)


Bootloader (FREELDR)

Kernel and Executive (NTOSKRNL)


  • Merged a number of improvements from the new Configuration Manager by Alex Ionescu to trunk (Aleksey Bragin)
  • Updated cmlib's interface to NT 5.2 (Aleksey Bragin)
  • Fixed a bug in CmpInitializeHive which was calling HvInitializeHive with inverted parameters (Aleksey Bragin)
  • Implement a fast->slow leaf conversion (Aleksey Bragin)
  • Completed the CM rewrite, so that the old hackish and buggy CM routines are finally completely gone (Aleksey Bragin)


  • Improve KDBG symbol loading mechanism, while still maintaining compatibility when compiled with KDBG=0 (Aleksey Bragin)
  • The debug object created by NtCreateDebugObject() is restricted to DEBUG_OBJECT_WAIT_STATE_CHANGE, change to DEBUG_OBJECT_ALL_ACCESS. (Timo Kreuzer, bug #2310)
  • Turn KDBG into KD-wrapper (Aleksey Bragin)


  • NtLoadDriver APIs refactor/improvement (Aleksey Bragin)
  • Almost completely fix the hack in IopParseDevice which was resulting in "FIXME: Broken Parse due to invalid DesiredAccess" messages, by changing some calls to IoGetDeviceObjectPointer to use FILE_READ_ATTRIBUTES instead of FILE_READ_DATA (so that the volume doesn't get mounted) (Aleksey Bragin)
  • Implement IoCheckEaBufferValidity() (Daniel Zimmerman)
  • Implement IoForwardIrpSynchronously (Hervé Poussineau)


  • Implement KiTrap19 handler (XMMI exceptions, mostly copied KiTrap7 handler and used mxcsr status word and exceptions there). (Aleksey Bragin)
  • Dynamically enable it, if CPU supports XMMI (was already done in the kernel, but #if0-ed). (Aleksey Bragin)
  • Fixed a typo in the line which lead to actual zeroing of mxcsr, instead of zeroing only reserved bits (spotted by Kamil Hornicek)
  • SSE/SSE2/etc is not broken anymore (Aleksey Bragin, bug #2748)
  • Copy kernel's IDT entries to the IDT we've got from the bootloader. Fixes boot-process initiated by ntldr-compatible loaders (Aleksey Bragin)
  • KeRosCaptureUserStackBackTrace is now created, which calls RtlWalkFrameChain with the user-mode flag, meaning that bugchecks finally show the user-mode stack again. (Aleksey Bragin)
  • KeRosDumpStackFrames is fixed so that if the EIP can't be found in a module list, it's still displayed (just without the module name). Previously the EIP would not be shown, resulting in code running on the heap/stack/somewhere else not being shown as part of the trace (Aleksey Bragin)
  • Coalesce all calls to MmUpdatePageDir through a single inlined function - MiSyncProcessThreadViews, and fix callers which assumed that the kernel stack is KERNEL_STACK_SIZE, when in fact, it may be KERNEL_LARGE_STACK_SIZE. We now detect and handle this, fixing a bug in KiAttachProcess. (Aleksey Bragin)
  • Unlock address space before raising to HIGH_LEVEL in KeBugCheck (Aleksey Bragin, bugreports/info by Alex)
  • Fix LoaderPagesSpanned calculation (Aleksey Bragin)
  • Plugged in batching. (James Tabor)



  • Changed Memory Manager's early initialization to be slightly more ntldr-compatible (Aleksey Bragin)
  • Move Teb's StaticUnicodeString initialisation from ntdll to MmCreateTeb (it's better to initialize it early, and all at once) (Aleksey Bragin)
  • Actually create (in the bootloader) and then respect the memory map (in memory manager) (Aleksey Bragin, thanks to Alex)
  • Fix PSEH return usage Johannes Anderwald


  • ObReferenceObjectByHandle/ObpReferenceProcessByHandle: Properly return STATUS_INVALID_HANDLE if user-mode tries to reference a kernel-mode handle
    Properly validate process/thread access rights before giving a reference to the caller. (Aleksey Bragin, thanks to Alex!)
  • Fix definition of "SizeOfHandle" macro in the handle table implementation. Fixes handle leaks at process rundown, handle allocation, and problems with processes that use more than 512 handles. (Aleksey Bragin, thanks to Alex!)
  • Remove checks for "VALID_INHERIT_FLAGS". These flags have nothing to do with handle table entries and shouldn't appear in them. (Aleksey Bragin, thanks to Alex!)


  • Fixed a bug in PnP Manager for drivers which failed initialization at boot-time (Aleksey Bragin)
  • Improved compatibility in PnP Manager, driver's load and unload routines are alwyas called in context of the system process (Aleksey Bragin)
  • Correctly set DN_DRIVER_LOADED flag. This fixes multiple installation of i8042prt/kbdclass.sys on every boot. (Aleksey Bragin, bug #2330)
  • Fix possible buffer overflows in PnP Manager (Hervé Poussineau)



  • Fixed incompatible SeSet/QuerySecurityAccessMask() behaviour (Aleksey Bragin)

Hardware Abstraction Layer (HAL)

Run Time Library (RTL)

  • Fix multiple bugs in RtlWalkFrameChain and secure it against any possibility of a bugcheck while walking the stack. (Aleksey Bragin, bugreports and info by Alex)
  • Fix bugs in RtlUnwind and RtlExceptionDispatch which assumed the DPC stack size was 4KB instead of 12KB. (Aleksey Bragin, bugreports and info by Alex)
  • Fix multiple bugs in RtlpGetStackLimits and secure it against bugchecks. Properly detect DPC or invalid stacks. (Aleksey Bragin, bugreports and info by Alex)
  • Implemented RtlCopySecurityDescriptor (Gregor Brunmar)

Kernel Mode Drivers


  • Fixed the issue with floppy.sys hanging on boot (Cameron Gutman, bug #1508)


  • Reorganized NTFS driver header : renamed Magic to jump, and OemName to OEMID, created structures for BPB and EBPB and used them in BOOT_SECTOR one, added a field to BOOY_SECTOR structure. This is based on a Technet document and Alex Ionescu document (Pierre Schweitzer)
  • Updated NTFS header : separate a field into two distinct fields. One will be used when mounting volume, added comment to unusedX fields that are used anyway when mounting volume (Pierre Schweitzer)
  • Zero memory before use (Pierre Schweitzer)
  • Rewritten NTFS driver entry : use Hervé Poussineau debug method (better), thanks to (Hervé Poussineau), use NTAPI instead of STDCALL to have MSVC compatibility, thanks to (Hervé Poussineau), moved IRP functions array to a new function, NtfsInitializeFunctionPointers, added more checks, initialize global and local data before acting with kernel, removeed the use of one var (Pierre Schweitzer)


  • Moved the functions MOV_DD_SWP (the i486 version), MOV_DW2DD_SWP and MOV_DW_SWP to an external assembler file (Colin Finck)
  • Silence many warnings (Colin Finck)
  • Fix a bug, where all ATI chips were treated as Silicon Image chips (Colin Finck)
  • Make building with QUEUE_STATISTICS turned off possible (Samuel Serapión)


NT System Library (NTDLL)

Static Libraries



  • Fixed exception handling, and C++ specific exception handling in CRT/MSVCRT. Thanks to this most MFC applications are now working. (Aleksey Bragin)
  • _findnext is implemeneted and needs to be exported (not a stub). Fixes a crash in Abiword startup. (Thomas Bluemel)


Services (SCM)

  • Made each service have its own named pipe (Gregor Brunmar)
  • Implement the RPC server calls for QueryServiceConfig2 and ChangeServiceConfig2 (Ged Murphy)
  • Add the account name to the QueryServiceConfig RPC call (Ged Murphy)
  • Shutdown services when the SCM is terminated (Ged Murphy)
  • Add basic code for shutting down of the SCM (Ged Murphy)
  • Store the SERVICE_STATUS_HANDLE and use it for setting service status (Ged Murphy)
  • Add functionality for controlling services (Ged Murphy)
  • Receive a client service handle from advapi32 so we can get a permenant link between the SCM and the service (Ged Murphy)

Win32™ Personality

User mode subsystem server (CSRSS)

  • Fix updating default character attributes when calling SetConsoleTextAttribute() (Thomas Bluemel)
  • Fix console painting bugs (Thomas Bluemel)


  • Make OpenGL initialization thread-safe (Thomas Bluemel)
  • Fix AddFontResourceExAW parameter check (Timo Kreuzer)
  • Fix : add PatBlt and PolyPatBlt to usermode so they no longer redirect to win32k (Magnus Olsen)
  • Fix : AddFontResourceExW, SetLastError to invaild parameter when the flags are not set. (Magnus Olsen)
  • Redirect PATHOBJ_bEnum to win32k NtGdiPATHOBJ_bEnum (Magnus Olsen)
  • Redirect PATHOBJ_bEnumClipLines to win32k NtGdiPATHOBJ_bEnumClipLines (Magnus Olsen)
  • Redirect PATHOBJ_vEnumStart to win32k NtGdiPATHOBJ_vEnumStart (Magnus Olsen)
  • Redirect PATHOBJ_vEnumStartClipLines to win32k NtGdiPATHOBJ_vEnumStartClipLines (Magnus Olsen)
  • Redirect PATHOBJ_vGetBounds to win32k NtGdiPATHOBJ_vGetBounds (Magnus Olsen)
  • Redirect AnyLinkedFonts to win32k NtGdiAnyLinkedFonts (Magnus Olsen)
  • Redirect BRUSHOBJ_hGetColorTransform to win32k NtGdiBRUSHOBJ_hGetColorTransform (Magnus Olsen)
  • Redirect BRUSHOBJ_pvAllocRbrush to win32k NtGdiBRUSHOBJ_pvAllocRbrush (Magnus Olsen)
  • Redirect BRUSHOBJ_pvGetRbrush to NtGdiBRUSHOBJ_pvGetRbrush (Magnus Olsen)
  • Redirect BRUSHOBJ_ulGetBrushColor to NtGdiBRUSHOBJ_ulGetBrushColor (Magnus Olsen)
  • Redirect CLIPOBJ_bEnum to NtGdiCLIPOBJ_bEnum (Magnus Olsen)
  • Redirect CLIPOBJ_cEnumStart to NtGdiCLIPOBJ_cEnumStart (Magnus Olsen)
  • Redirect CLIPOBJ_ppoGetPath to NtGdiCLIPOBJ_ppoGetPath (Magnus Olsen)
  • Remove redirect of CombineRgn and CreateBitmap. Some parts need be done in user mode, not in win32k. Implement it as a stub with the syscall until there is time to review and rewrite this code correctly (Magnus Olsen)
  • Fix: Do not redirect CreateCompatibleDC and CreateCompatibleBitmap, they need to share memory and need to do some stuff in user mode (Magnus Olsen)
  • Remove redirect of CreateDIBitmap@24 to NtGdiCreateDIBitmap@24, and create a stub for it. We need to do some stuff in user mode (Magnus Olsen)
  • Fix: CreateDiscardableBitmap shall call CreateCompatibleBitmap instead of NtGdiCreateCompatibleBitmap to keep it in usermode (Magnus Olsen)
  • Fix: CreateEllipticRgnIndirect now crashes if the parameter is NULL, duplicating behavior in all Windows NT versions tested (Magnus Olsen)
  • Fix: CreatePalette calls NtGdiCreatePaletteInternal (Magnus Olsen)
  • Remove redirect of CreatePolyPolygonRgn and implement a hack for now (Magnus Olsen)
  • Remove redirect of CreatePolygonRgn and implement a hack for now (Magnus Olsen)
  • Remove redirect of CreateRectRgn to keep it in user mode (Magnus Olsen)
  • Fix CreateRectRgnIndirect to call on CreateRectRgn to keep it in user mode and crash if its parameter is NULL, duplicating behavior in all Windows NT versions tested. (Magnus Olsen)
  • Fix CreatePenIndirect to call on CreatePen to keep it in user mode. (Magnus Olsen)
  • Implement DeviceCapabilitiesExA and DeviceCapabilitiesExW, both always return -1 (Magnus Olsen)
  • Redirect DeleteColorSpace to win32k NtGdiDeleteColorSpace (Magnus Olsen)
  • Comprehensive changes to bring ReactOS Gdi32 to a compatible state based on Feng Yuan book "Windows Graphics Programming Win32 GDI and DirectDraw". (James Tabor)
  • Add usermode checks to GetDIBits, passes 21 out of 27 tests (Ged Murphy)
  • Add GdiSetLastError to the lib instead of forwarding it straight to kernel32 (Ged Murphy)

User mode subsystem client (USER32)

  • Translate pointers in ValidateHandle to the user mode mapping (Thomas Bluemel)
  • Dereference callproc handles without a system call (Thomas Bluemel)
  • Begin superseding the WINDOW_OBJECT structure by WINDOW which is located on the desktop heap (Thomas Bluemel)
  • Implement GetClientRect(), GetWindowRect(), GetWindowLong(), GetWindowText(), GetWindowTextLength(), GetClassLong(), ClientToScreen(), ScreenToClient(), MapWindowPoints(), IsWindow(), IsWindowUnicode(), IsChild(), IsWindowVisible(), GetParent(), GetWindow(), GetDesktopWindow() to read the information from the desktop heap (Thomas Bluemel)
  • Optimize SendMessage(), TranslateMessage() and DispatchMessage() to avoid system calls when possible (Thomas Bluemel)
  • Implement WM_QUERYUISTATE, WM_CHANGEUISTATE and WM_UPDATEUISTATE and make dialogs update the UI state (Thomas Bluemel)
  • Support DT_PREFIXONLY and DT_HIDEPREFIX in DrawTextEx and support DSS_PREFIXONLY and DSS_HIDEPREFIX in DrawState (Thomas Bluemel)
  • Support hiding keyboard cues and focus rectangles for the standard controls (Thomas Bluemel)
  • Get rid of string pool helper routines (Thomas Bluemel)
  • Fix leaky bitmaps in the CopyIcon call (Ged Murphy)
  • Add a very bare bones implementation of IMAGE_ICON for CopyImage (Ged Murphy)
  • Move the IMAGE_BITMAP stuff to a seperate function which will eventually be rewritten (Ged Murphy)

Kernel-mode subsystem server (Win32K)

  • Made EnumDisplaySettings work (Gregor Brunmar, bug #2584)
  • Enable the Windows Server 2003 behaviour for SetTimer (Colin Finck)
  • Extend hack in NtUserEnumDisplayDevices to fail enumerating monitors. Fixes an infinite loop in deskmon.dll (Thomas Bluemel)
  • Tweak the ScrollDC implementation a bit so that it produces a better output (Thomas Bluemel)
  • Optimize FrameRgn for simple rectangular regions (Thomas Bluemel)
  • Keep callproc handles valid as long as a window classes exists (Thomas Bluemel)
  • Dereference callproc handles without a system call (Thomas Bluemel)
  • Expose the pointer to the shared heap and the delta to the user mode mapping (Thomas Bluemel)
  • Rename NtGdiSelectPalette to NtUserSelectPalette (Timo Kreuzer)
  • Implement NtGdiDoPalette (Timo Kreuzer)
  • Remove NtGdiAnimatePalette, NtGdiGe/SetPaletteEntries, NtGdiGetSystemPaletteEntries, NtGdiGet/SetDIBColorTable (Timo Kreuzer)
  • Add pool tags for gdi objects (Timo Kreuzer)
  • Cleanup EXTPENS and PENS in BRUSH_Cleanup, remove EXTPEN_Cleanup (Timo Kreuzer)
  • Use a new ObjectType list with fixed indices (Timo Kreuzer)
  • Allow GDI object allocation without a lookaside list (Timo Kreuzer)
  • Make the GDI object's type field more windows compatible (Timo Kreuzer)
  • Basic implementation of NtGdiSetDIBitsToDeviceInternal() (Timo Kreuzer)
  • Add missing NtUser stubs and fix some parameter counts to make win32k syscalls Windows XP compatible (Timo Kreuzer)
  • Remove ToUnicode() stub (Timo Kreuzer)
  • UserScrollDC: small simplification and fix calculation of invalidated region (Timo Kreuzer)
  • IntGdiPolygon: close the polygon outline (Timo Kreuzer), bug #2782
  • Fix bug in NtUserToUnicodeEx (Timo Kreuzer), bug #2557
  • NtUserScrollwindowEx: fix the default clip region (Timo Kreuzer)
  • NtGdiBitBlt, IntGdiGetClipBox: don't SetLastError() on invalid DC (Timo Kreuzer)
  • Release keyboard modifiers in KeybardThreadMain on KEY_BREAK (Timo Kreuzer), bug #2751
  • Implement stub for NtGdiAnyLinkedFonts, NtGdiBRUSHOBJ_hGetColorTransform, NtGdiBRUSHOBJ_pvAllocRbrush, NtGdiCLIPOBJ_bEnum, NtGdiCLIPOBJ_cEnumStart, NtGdiCLIPOBJ_ppoGetPath, NtGdiBRUSHOBJ_ulGetBrushColor, NtGdiBRUSHOBJ_pvAllocRbrush, NtGdiBRUSHOBJ_pvGetRbrush (Magnus Olsen)
  • Implement NtGdiCreatePaletteInternal (Magnus Olsen)
  • Remove NtGdiCreatePalette. It was a ROS specfific function in the win32k syscall list. It has been replaced with NtGdiCreatePaletteInternal (Magnus Olsen)
  • Remove NtGdiCreatePolygonRgn. It was a ROS specfific function in the win32k syscall list that redirected to another ROS specific syscall named NtGdiCreatePolyPolygonRgn (Magnus Olsen)
  • Added missing information from PrimarySurface.DMW when display driver defaults back to the video driver's standard mode (Gregor Brunmar)
  • Fixed caching system in IntEnumDisplaySettings when run more than once (Gregor Brunmar)
  • Hacked a way around the bug in FindDDIDriver (Gregor Brunmar)
  • Fix desktop heaps handling and various bugs (Thomas Bluemel)
  • Make registration of system window classes a bit more robust (Thomas Bluemel)
  • Store the internal window placement directly inside the WINDOW structure (Thomas Bluemel)
  • fix code which wasn't strict ANSI-C compatible Johannes Anderwald
  • Comprehensive changes to bring ReactOS Win32k to a compatible state based on Feng Yuan book "Windows Graphics Programming Win32 GDI and DirectDraw". (James Tabor)
  • When converting from a DDB to a DIB, the palette should be the same in the resulting DIB as the original DDB (Ged Murphy)
  • Partial rewrite of NtGdiGetDIBitsInternal and wrap all usermode read/writes in SEH (Ged Murphy)
  • Fix painting of alpha channels in 32bpp icons onto windows/dialogs (Ged Murphy)
  • Fix param checking and don't send negative values in the SIZEL struct of IntCreateBitmap (Ged Murphy)
  • Don't lock bitmaps unnecessarily and don't leak a bitmap object in case of failure (Ged Murphy)
  • Fix passing of minus values for creating topdown bitmaps (Ged Murphy)
  • Remove the ros only NtUserGetCursorIconSize and implement NtUserGetIconSize in it's place (Ged Murphy)
  • Remove NtUserGetCursorIconSize (Ged Murphy)
  • Add a new routine to NtUSerCallOneParam which returns newly created handles for icons and cursors (Ged Murphy)
  • Fix the NtUserGetIconSize prototype (Ged Murphy)
  • Fix NtUserGetIconInfo and use SEH directly (Ged Murphy)
  • Fix the NtUserSetCursorIconData definition and rewrite it (not fully complete) (Ged Murphy)
  • Read from HKCU\Keyboard Layout\Preload for getting the keyboard layout ID to use instead of using the default locale. Fall back to HKU\.DEFAULT\Keyboard Layout\Preload if no user is currently logged on.
    This finally makes it possible to set the keyboard layout and system locale independently. (Colin Finck)
  • Bugcheck if no miniport video driver is available (Hervé Poussineau, Bug #2899)


  • Implement multiple language support for text-mode setup (Johannes Anderwald)
  • Set the system locale and keyboard layout ID independently (Colin Finck)
  • Add a SourceDisksFiles section in txtsetup.sif. Use it in usetup and freeldr (Hervé Poussineau)

Control panel applets

  • Use the unicode="yes" attribute in the module element instead of defining UNICODE and _UNICODE. (Eric Kohl)


  • Enable the filter keys settings when the test area EDITTEXT control gets the focus and disable the settings when the focus leaves the control. (Eric Kohl)
  • Merge all settings in a single struct. This is required to implement the administrative options. (Eric Kohl)
  • Move the settings read code into a single function which is called before creating the property sheet. (Eric Kohl)
  • Fix a cut & paste bug. (Eric Kohl)


  • Change listbox to listview, draw icons, add a find bar. "Install" button moved to a separate tab, also buttons "Download!" and "Find in the Internet" are added there too. Applet's width increased. Make the "Information" tab work. Other changes (Dmitry Chapyshev)
  • Process window messages while the (un)installer is running and disable it (Thomas Bluemel)
  • Don't call SHBrowseForFolder() with random pointers (Thomas Bluemel)
  • Implement create shortcut wizard Johannes Anderwald


  • Display advanced display settings and allow shell extensions to extend it. Not yet fully functional/working (Thomas Bluemel)
  • Allow changing the screen resolution in the advanced adapter settings through desk.cpl (Thomas Bluemel)
  • Add a (not yet functional) control to allow the user to arrange the monitors (Thomas Bluemel)
  • Display monitor number and various bug fixes (Thomas Bluemel)
  • Add ability to change/query single monitors and change/query the current selection in the monitor arrangement control (Thomas Bluemel)
  • Allow altering the monitor arrangement control behavior flags (Thomas Bluemel)
  • Fix displaying the window caption height (SM_CYCAPTION includes SM_CYBORDER) (Thomas Bluemel)
  • Send notification if another monitor is selected (Thomas Bluemel)
  • Display a context menu for the selected monitor (Thomas Bluemel)
  • Check if reading theme settings from the registry was successful (Thomas Bluemel)
  • Add very basic dragging support to the monitor selection control (Thomas Bluemel)
  • Allow selecting monitors using the keyboard (Thomas Bluemel)
  • Initialize the COM library (Thomas Bluemel)
  • Destroy created pen after use (fixes a GDI object leak) (Thomas Bluemel)
  • Add spectrum bitmaps for 4bpp, 8bpp and 16-32bpp (Colin Finck)
  • Change the current spectrum bitmap, when the user selects another color depth (Colin Finck)
  • Enable support for 4bpp color depth (Colin Finck)
  • Half implement support for multiple monitors to desk.cpl (Ged Murphy)


  • Use BEGIN and END instead of { and } in resource scripts. (Eric Kohl)
  • Make it UNICODE-safe. (Eric Kohl)


  • Change the currently selected locale ID instead of LOCALE_USER_DEFAULT. (Eric Kohl)
  • Let the user choose between 0 and 9 fractional digits. (Eric Kohl)
  • Fix a typo: SendMesssageW --> SendMessage. (Eric Kohl)
  • Enumerate time formats. (Eric Kohl)
  • The user must able to change the locale ID. Move it into a global structure. (Eric Kohl)
  • Enumerate short and long date formats. (Eric Kohl)





  • Implemented the network status property applet to show the actual information (Gregor Brunmar)


  • Don't change the current power scheme when displaying the dialog (Thomas Bluemel)
  • Load additional pages provided by shell extensions (Thomas Bluemel)
  • Keep the value type of each environment variable that was read from the registry and assign the right type for new and modified variables. (Eric Kohl)
  • Read and write the the raw (non-expanded) environment variables and display the cooked (expanded) ones only. (Eric Kohl)
  • Make local functions static. (Eric Kohl)
  • Reorder functions to reduce the number of required prototypes. (Eric Kohl)
  • Use Win32 types instead of generic types (e.g. int -> INT) and add missing VOIDs. (Eric Kohl)


  • Added the build date and revision number to sysdm.cpl (Samuel Serapión, bug #2683)
  • Display the processor frequency and RAM size with the correct decimal separator based on the current locale (Colin Finck)



  • Add icons for user, locked user and group. (Eric Kohl)
  • Enable users to change their name and password (not fully working yet). (Eric Kohl)
  • Use the IDI_ prefix for icons. (Eric Kohl)
  • Create image lists for the groups and users list views and add images to the list view items. (Eric Kohl)

Win32™ Applications

3D Text OpenGL Screensaver

  • Added a 3D Text OpenGL based screensaver (Marc Piulachs)
  • Query and set the display string using data length counted in bytes. (Eric Kohl)
  • Fix function prototypes and two typos. (Eric Kohl)
  • Rotate the text around its center. (Eric Kohl)

Butterflies Screensaver


  • Scroll 1 position on SB_LINEDOWN and 1 page on SB_PAGEDOWN, update window on SB_THUMPTRACK, use ScrollWindowEx on scrolling (Timo Kreuzer)
  • convert the app to unicode only (Ged Murphy)



  • Fix memory leaks/wrong heap usage by replacing calls to _tcsdup with cmd_dup (Thomas Bluemel)
  • Display a list of all leaked memory blocks when terminating (Thomas Bluemel)
  • When something tries to copy a file over itself, show an error message. (Colin Finck)
  • Add cmd history with the right key (Hervé Poussineau, Bug #2248)



  • Added an Event Log Viewer (Marc Piulachs, Bug #2602)
  • Hardcoded the Window class string, there is no reason for it to be in localized resource files (Colin Finck)


  • Remove checkbox for version display (Timo Kreuzer), bug #2323


  • Added a LogEvent utility for adding an event to the EventLog (Marc Piulachs)
  • Accept the input parameters case-insensitive and replace the "/h" option by a "/?" option (Colin Finck)


  • Hardcoded the Window class string, there is no reason for it to be in localized resource files (Colin Finck)
  • Removed duplicate header inclusions (Colin Finck)

Matrix Screensaver

  • Set g_nMatrixSpeed to 10 as the default value. This makes it work correctly under Windows XP SP2 and Windows Server 2003 again (Colin Finck)

MSTSC (remote desktop)

  • Add a remote desktop client. Too many changes to list (Ged Murphy)

Service Control Program (servman)

  • Rewrite the Control code (Ged Murphy)
  • Smooth the progress bar movement (Ged Murphy)
  • Improve the button states in relation to the service (Ged Murphy)
  • Only run the change code when we have the changed struct to work with (Ged Murphy)
  • Improve method to fill out the service info (Ged Murphy)


  • Compute some metrics based on the cards, which were formerly hardcoded.
    This enables us to use the Bavarian cards.dll and theoretically cards in any size (Colin Finck)
  • Compute the card offset for the row stack based on the height of the card (Colin Finck)
  • Bugfix: When you used the 1-card-mode before, there never was a card behind the one, which you drag from the pile.
    Now Solitaire collects all the cards from the deck in the 1-card-mode like Windows Solitaire does. (Colin Finck)
  • Make it possible to use the "O" and the "X" sign as empty images for a deck.
    Actually make use of the "O" sign for the deck. (Colin Finck)
  • Use StretchBlt with fixed values for drawing the card backs in the Deck Options dialog.
    This way the dialog looks normally, also with bigger cards like the Bavarian ones. (Colin Finck)




  • Ensure that the "Name" column will always be shown, so a Registry setting can't influence it. (Carlo Bramini, bug #2217)
  • Taskmgr could already be compiled only when Unicode compilation was enabled.
    Make this obvious now by replacing all TCHAR's and TCHAR functions with WCHAR's and wide-character functions and getting rid of the "tchar.h" inclusion. (Colin Finck)
  • Fixed a handle leak (Pierre Schweitzer, bug #2772)
  • Silence some warnings when compiling Task-Manager with MSVC (Colin Finck)
  • Get rid of much duplicated code for setting the process priority (Carlo Bramini)


  • Make the appearance and layout more like the MS version (Martin Grogan, bug #2060)
  • Added functionality for resetting scores (Martin Grogan, bug #2060)
  • Auto-complete the board, when the player is guaranteed to win (Martin Grogan, bug #2060)
  • Get the application to compile warning-free under MSVC (Colin Finck)
  • Convert the application from ANSI to TCHAR and enable Unicode compilation in the .rbuild file (Carlo Bramini, bug #2815)
  • Dialog procedures now return INT_PTR instead of BOOL (Carlo Bramini, bug #2815)
  • Fixed a bug in SetDifficulty(): If custom selection, then no changes are done if the user presses the CANCEL button. (Carlo Bramini, bug #2815)
  • Show mines in the end board in all mine boxes, which you previously marked with the QUESTION state, when you lost the game (Carlo Bramini, bug #2815)
  • Define the WineMine root registry key in just one place as a constant rather than a #define, point it to the Software\Microsoft\WinMine key (Carlo Bramini, bug #2815)
  • Make our registry settings compatible with the MS WinMine settings (Colin Finck)
  • Remove the WINE_STRICT check, which was needed to avoid an ancient WINE bug, but doesn't affect our tree (Colin Finck)
  • Use ShellAbout instead of a custom About dialog (Colin Finck)
  • Use consistent variable namings and types (Colin Finck)

Win32™ Libraries


  • Port RegLoadMUIStringA/W from WINE HEAD and adjust parameter names (Thomas Bluemel)
  • Load libraries as data files in RegLoadMUIString (Thomas Bluemel)
  • fix RegLoadMUIStringA&W prototype Johannes Anderwald
  • Fix the client side of the ChangeServiceConfig2 RPC call to send the text in the lpDescription pointer of SERVICE_DESCRIPTION tagged onto the end of the struct (Ged Murphy)
  • Send the SERVICE_STATUS_HANDLE to the SCM so SetServiceStatus has something to work with (Ged Murphy)
  • Add control code to stop, pause and resume services and forward it onto the service control handler (Ged Murphy)
  • Share a client service handle with the SCM and use it to identify services. (Ged Murphy)
  • Implement BackupEventLogA/W, ClearEventLogA/W, CloseEventLog, DeregisterEventSource, GetNumberOfEventLogRecords, GetOldestEventLogRecord, OpenBackupEventLogA/W, OpenEventLogA/W, ReadEventLogA/W, RegisterEventSourceA/W by calling appropriate method in eventlog.exe (Hervé Poussineau)


  • Fixed Propsheet's apply button enabling at the wrong time (Gregor Brunmar), bug #2456
  • Added context menu on right click in treeviews (Gregor Brunmar)
  • Fixed calendar window not closing automatically (Gregor Brunmar), bug #2555


  • Merge the card bitmaps of "cardsbav" to our cards.dll and specify with preprocessor definitions, which cards shall be compiled into the DLL (Colin Finck)




  • Add initial implementation of the display adapter desk.cpl shell extension (Thomas Bluemel)
  • Display the display device adapter name and show device properties (Thomas Bluemel)
  • Display adapter information (Thomas Bluemel)
  • Implement the "List all modes" dialog, read-only for now (Thomas Bluemel)
  • Select currently selected mode by default (Thomas Bluemel)
  • Display the display adapter properties with extended pages (Thomas Bluemel)
  • Set the current device mode selection to the current one if the mode was changed successfully (Thomas Bluemel)


  • Add an initial implementation of the display monitor shell extension for desk.cpl (Thomas Bluemel)
  • Display a list of monitors if there's more than one monitor (Thomas Bluemel)
  • Display a list of available refresh rates for the current mode (Thomas Bluemel)
  • Allow changing the display refresh frequency (Thomas Bluemel)


  • Implement DevicePropertiesA/W by calling DevicePropertiesExA/W and move function prototypes to a private header (Thomas Bluemel)
  • Fix implementation of DevicePropertiesA/W to show extended pages (Thomas Bluemel)


  • Rename DSOUND_DllRegisterServer to DllRegisterServer and DSOUND_DllUnregisterServer to DllUnregisterServer (Colin Finck)


  • Implement basics of input.dll (Dmitry Chapyshev)
  • Don't stop processing the keyboard layouts, when no "Keyboard Layouts\Substitudes" key exists (WinXP's input.dll behaves the same way).
    Now input.dll already shows us the current selected keyboard layout under ReactOS (Colin Finck)
  • Support IRP cancellation in kbdclass/mouclass (Hervé Poussineau)



MME API (WinMM / MMSystem)

  • Added registry key enumeration for "Drivers" and "Drivers32" in place of the WINE-specific code (and hard-coded MIDI and wave mappers) for determining user-mode drivers that require loading (Andrew Greenwood)



  • Fix freeing lists on process detach (Thomas Bluemel)
  • Make initializing the ICD in ROSGL_ICDForHDC thread-safe (Thomas Bluemel)
  • Delete all GLDCDATA structures in wglDeleteContext that share the same ICD (Thomas Bluemel)




  • Fix SetupDiGetClassImageListExW to load the system imagelist correctly (Ged Murphy)
  • Read ClassGUID from the registry instead of sending GUID_NULL (Ged Murphy)
  • Fix SetupDiLoadClassIcon to load 32x22 for the large icon (Ged Murphy)
  • Fix SetupDiGetClassImageList to load 16x16 icons for the device image list. (Ged Murphy)
  • Add most of the device icons required for the system imagelist (Ged Murphy)
  • Implement ProfileItems support in .inf files (Hervé Poussineau, Bug #2739)
  • Handle AddReg and DelReg in Service section (Hervé Poussineau)
  • Read Characteristics and BusType keys from .inf file, and write them to the Registry. (Hervé Poussineau)
  • Do not delete .inf section name extension when installing drivers (Hervé Poussineau, Bugs #1147, #1845)


  • Enable the code to determine the time zone from the default system language (Thomas Bluemel)
  • Removed an old hack that's not necessary any longer since r31418 (2nd stage localization) (Pierre Schweitzer)



Versions / Official Changelogs / Community Changelogs
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0.1.x Series 0.1.0 | 0.1.1 | 0.1.2 | 0.1.3 | 0.1.4 | 0.1.5
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0.4.x Series 0.4.0 | 0.4.1 | 0.4.2 | 0.4.3 | 0.4.4 | 0.4.5 | 0.4.6 | 0.4.7 | 0.4.8 | 0.4.9 | 0.4.10 | 0.4.11 | 0.4.12 | 0.4.13 | 0.4.14