I recently installed the Windows 7 x64 public beta and was having a look for API changes. I have gone through ntdll.dll, kernel32.dll, and user32.dll from the syswow64 folder (I know IA-32 ASM better than AMD64) and compared all the exports to those from Windows Server 2008 in order to pull out any changes. I figured this would be of use to curious people (like me) who are also lazy (like me). The results are posted below.
The lists include both new and new apis, and ones that have been modified slightly (ie the kernel32.dll calls that are forwarded).
Kernel32:
AddIntegrityLabelToBoundaryDescriptor
BaseCheckAppcompatCacheEx
BaseDllReadWriteIniFile
BaseFormatObjectAttributes
BaseFormatTimeOut
BaseGetNamedObjectDirectory
BaseSetLastNTError
BaseVerifyUnicodeString
Basep8BitStringToDynamicUnicodeString
BasepAllocateActivationContextActivationBlock
BasepAnsiStringToDynamicUnicodeString
BasepFreeActivationContextActivationBlock
BasepIsRealtimeAllowed
BasepMapModuleHandle
CallbackMayRunLong
CallbackMayRunLong (forwarded to NTDLL.TpCallbackMayRunLong)
CopyExtendedContext
CreateRemoteThreadEx (forwarded to Microsoft-Windows-System-Process-ProcessThreads-L1-1-0.CreateRemoteThreadEx)
DeleteProcThreadAttributeList
DeleteProcThreadAttributeList (forwarded to Microsoft-Windows-System-Process-ProcessThreads-L1-1-0.DeleteProcThreadAttributeList)
FindStringOrdinal
GetActiveProcessorCount
GetActiveProcessorGroupCount
GetCPFileNameFromRegistry
GetCurrentProcessorNumber (forwarded to NTDLL.NtGetCurrentProcessorNumber)
GetCurrentProcessorNumber (forwarded to NTDLL.RtlGetCurrentProcessorNumber)
GetCurrentProcessorNumberEx (forwarded to NTDLL.RtlGetCurrentProcessorNumberEx)
GetEnabledExtendedFeatures (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlGetEnabledExtendedFeatures)
GetEraNameCountedString
GetExtendedContextLength (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlGetExtendedContextLength)
GetExtendedFeaturesMask (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlGetExtendedFeaturesMask)
GetLogicalProcessorInformationEx (forwarded to Microsoft-Windows-System-SysInfo-L1-1-0.GetLogicalProcessorInformationEx)
GetMaximumProcessorCount
GetMaximumProcessorGroupCount
GetNumaAvailableMemoryNodeEx
GetNumaNodeNumberFromHandle
GetNumaNodeProcessorMaskEx
GetNumaProcessorNodeEx
GetNumaProximityNodeEx
GetProcessGroupAffinity
GetProcessPreferredUILanguages
GetProcessorSystemCycleTime
GetSystemInfoInternal
GetThreadErrorMode
GetThreadGroupAffinity
GetThreadIdealProcessorEx
InitializeExtendedContext
InitializeProcThreadAttributeList
InitializeProcThreadAttributeList (forwarded to Microsoft-Windows-System-Process-ProcessThreads-L1-1-0.InitializeProcThreadAttributeList)
K32EmptyWorkingSet
K32EnumDeviceDrivers
K32EnumPageFilesA
K32EnumPageFilesW
K32EnumProcessModules
K32EnumProcessModulesEx
K32EnumProcesses
K32GetDeviceDriverBaseNameA
K32GetDeviceDriverBaseNameW
K32GetDeviceDriverFileNameA
K32GetDeviceDriverFileNameW
K32GetMappedFileNameA
K32GetMappedFileNameW
K32GetModuleBaseNameA
K32GetModuleBaseNameW
K32GetModuleFileNameExA
K32GetModuleFileNameExW
K32GetModuleInformation
K32GetPerformanceInfo
K32GetProcessImageFileNameA
K32GetProcessImageFileNameW
K32GetProcessMemoryInfo
K32GetWsChanges
K32GetWsChangesEx
K32InitializeProcessForWsWatch
K32QueryWorkingSet
K32QueryWorkingSetEx
LoadAppInitDlls
LocateExtendedFeature (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlLocateExtendedFeature)
LocateLegacyContext (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlLocateLegacyContext)
NlsConvertIntegerToString
NotifyMountMgr
PowerClearRequest
PowerCreateRequest
PowerSetRequest
QueryIdleProcessorCycleTimeEx
QueryThreadpoolStackInformation
QueryUnbiasedInterruptTime
RaiseFailFastException
ResolveLocaleName
RtlCaptureContext
RtlCaptureContext (forwarded to NTDLL.RtlCaptureContext)
RtlCaptureStackBackTrace
RtlCaptureStackBackTrace (forwarded to NTDLL.RtlCaptureStackBackTrace)
RtlFillMemory
RtlFillMemory (forwarded to NTDLL.RtlFillMemory)
RtlUnwind
RtlUnwind (forwarded to NTDLL.RtlUnwind)
SetExtendedFeaturesMask (forwarded to MICROSOFT-WINDOWS-SYSTEM-XSTATE-L1-1-0.RtlSetExtendedFeaturesMask)
SetProcessPreferredUILanguages
SetSearchPathMode
SetThreadErrorMode
SetThreadGroupAffinity
SetThreadIdealProcessorEx
SetThreadpoolStackInformation
SetWaitableTimerEx (forwarded to Microsoft-Windows-System-ThreadPool-L1-1-0.SetWaitableTimerEx)
SortCloseHandle
SortGetHandle
TryAcquireSRWLockExclusive (forwarded to NTDLL.RtlTryAcquireSRWLockExclusive)
TryAcquireSRWLockShared (forwarded to NTDLL.RtlTryAcquireSRWLockShared)
UpdateProcThreadAttribute
UpdateProcThreadAttribute (forwarded to Microsoft-Windows-System-Process-ProcessThreads-L1-1-0.UpdateProcThreadAttribute)
WerRegisterRuntimeExceptionModule
WerUnregisterRuntimeExceptionModule
User32:
CalculatePopupWindowPosition
ChangeWindowMessageFilterEx
CheckImeHotKey
CloseGestureInfoHandle
CloseTouchInputHandle
ConsoleControl
ControlMagnification
DisplayConfigGetDeviceInfo
DisplayConfigSetDeviceInfo
DwmGetDxRgn
DwmGetDxSharedSurface
DwmHintDxUpdate
GestureCommand
GetDisplayConfigBufferSizes
GetGestureCommandInfo
GetGestureConfig
GetGestureExtraArgs
GetGestureInfo
GetImeHotKey
GetInputLocaleInfo
GetMagnificationDesktopColorEffect
GetMagnificationDesktopMagnification
GetMagnificationLensCtxInformation
GetServicesProcess
GetTopLevelWindow
GetTouchInputInfo
GetWindowCompositionAttribute
GetWindowCompositionInfo
GetWindowDisplayAffinity
IsTopLevelWindow
IsTouchWindow
NotifyOverlayWindow
QueryDisplayConfig
RegisterGestureHandlerWindow
RegisterTouchWindow
SetConsoleReserveKeys
SetDisplayConfig
SetGestureConfig
SetMagnificationDesktopColorEffect
SetMagnificationDesktopMagnification
SetMagnificationLensCtxInformation
SetWindowCompositionAttribute
SetWindowDisplayAffinity
SfmDxBindSwapChain
SfmDxGetSwapChainStats
SfmDxOpenSwapChain
SfmDxQuerySwapChainBindingStatus
SfmDxReleaseSwapChain
SfmDxSetSwapChainStats
UnregisterGestureHandlerWindow
UnregisterTouchWindow
VRipOutput
VTagOutput
Win32PoolAllocationStats
gSharedInfo
gapfnScSendMessage
Ntdll:
AlpcRundownCompletionList
EtwEventWriteEx
EtwEventWriteNoRegistration
EvtIntReportAuthzEventAndSourceAsync
EvtIntReportEventAndSourceAsync
LdrGetDllHandleByMapping
LdrGetDllHandleByName
LdrResGetRCConfig
LdrRscIsTypeExist
LdrpResGetRCConfig
NtAllocateReserveObject
NtCancelDeviceWakeupRequest
NtCreateProfileEx
NtDisableLastKnownGood
NtDrawText
NtEnableLastKnownGood
NtNotifyChangeSession
NtOpenKeyEx
NtOpenKeyTransactedEx
NtQuerySecurityAttributesToken
NtQuerySystemInformationEx
NtQueueApcThreadEx
NtRequestDeviceWakeup
NtRequestWakeupLatency
NtSerializeBoot
NtSetIoCompletionEx
NtSetTimerEx
NtUmsThreadYield
NtWow64GetCurrentProcessorNumberEx
NtWow64InterlockedPopEntrySList
RtlAcquireReleaseSRWLockExclusive
RtlAddIntegrityLabelToBoundaryDescriptor
RtlContractHashTable
RtlCopyExtendedContext
RtlCreateHashTable
RtlCreateProcessReflection
RtlCreateVirtualAccountSid
RtlDeleteHashTable
RtlDetectHeapLeaks
RtlDisableThreadProfiling
RtlEnableThreadProfiling
RtlEndEnumerationHashTable
RtlEndWeakEnumerationHashTable
RtlEnumerateEntryHashTable
RtlEthernetAddressToStringA
RtlEthernetAddressToStringW
RtlEthernetStringToAddressA
RtlEthernetStringToAddressW
RtlExpandHashTable
RtlFillMemoryUlonglong
RtlGetCurrentProcessorNumberEx
RtlGetEnabledExtendedFeatures
RtlGetExtendedContextLength
RtlGetExtendedFeaturesMask
RtlGetFullPathName_UEx
RtlGetLocaleFileMappingAddress
RtlGetNextEntryHashTable
RtlGetProcessPreferredUILanguages
RtlInitEnumerationHashTable
RtlInitWeakEnumerationHashTable
RtlInitializeExtendedContext
RtlInsertEntryHashTable
RtlInterlockedClearBitRun
RtlInterlockedSetBitRun
RtlIsNameInExpression
RtlKnownExceptionFilter
RtlLoadString
RtlLocateExtendedFeature
RtlLocateLegacyContext
RtlLookupEntryHashTable
RtlQueryPerformanceCounter
RtlQueryPerformanceFrequency
RtlQueryThreadProfiling
RtlReadThreadProfilingData
RtlRemoveEntryHashTable
RtlReplaceSidInSd
RtlReportSilentProcessExit
RtlReportSqmEscalation
RtlSetExtendedFeaturesMask
RtlSetProcessPreferredUILanguages
RtlTryAcquireSRWLockExclusive
RtlTryAcquireSRWLockShared
RtlUTF8ToUnicodeN
RtlUnicodeToUTF8N
RtlWeaklyEnumerateEntryHashTable
SbExecuteProcedure
SbSelectProcedure
TpAllocAlpcCompletionEx
TpAlpcRegisterCompletionList
TpAlpcUnregisterCompletionList
TpCallbackIndependent
TpDbgGetFreeInfo
TpDisablePoolCallbackChecks
TpPoolFreeUnusedNodes
TpQueryPoolStackInformation
TpSetDefaultPoolMaxThreads
TpSetDefaultPoolStackInformation
TpSetPoolStackInformation
WerCheckEventEscalation
WerReportWatsonEvent
WinSqmAddToAverageDWORD
WinSqmAddToStreamEx
WinSqmCheckEscalationAddToStreamEx
WinSqmCheckEscalationSetDWORD
WinSqmCheckEscalationSetDWORD64
WinSqmCheckEscalationSetString
WinSqmCommonDatapointDelete
WinSqmCommonDatapointSetDWORD
WinSqmCommonDatapointSetDWORD64
WinSqmCommonDatapointSetStreamEx
WinSqmCommonDatapointSetString
WinSqmGetEscalationRuleStatus
WinSqmGetInstrumentationProperty
WinSqmIncrementDWORD
WinSqmIsOptedInEx
WinSqmSetDWORD
WinSqmSetDWORD64
WinSqmSetEscalationInfo
WinSqmSetIfMaxDWORD
WinSqmSetIfMinDWORD
ZwAllocateReserveObject
ZwCancelDeviceWakeupRequest
ZwCreateProfileEx
ZwDisableLastKnownGood
ZwDrawText
ZwEnableLastKnownGood
ZwNotifyChangeSession
ZwOpenKeyEx
ZwOpenKeyTransactedEx
ZwQuerySecurityAttributesToken
ZwQuerySystemInformationEx
ZwQueueApcThreadEx
ZwRequestDeviceWakeup
ZwRequestWakeupLatency
ZwSerializeBoot
ZwSetIoCompletionEx
ZwSetTimerEx
ZwUmsThreadYield
ZwWow64GetCurrentProcessorNumberEx
ZwWow64InterlockedPopEntrySList
Reverse Engineering, Windows
reversing, Windows