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SYSTEM_INFORMATION_CLASS (ntdll)
 
.
Summary
Tells NtQuerySystemInformation and NtSetSystemInformation what you would like to read/change.

C# Signature:

public enum SYSTEM_INFORMATION_CLASS
{
    SystemBasicInformation                = 0x00,
    SystemProcessorInformation                = 0x01,
    SystemPerformanceInformation              = 0x02,
    SystemTimeOfDayInformation                = 0x03,
    SystemPathInformation                 = 0x04,
    SystemProcessInformation                  = 0x05,
    SystemCallCountInformation                = 0x06,
    SystemDeviceInformation                   = 0x07,
    SystemProcessorPerformanceInformation         = 0x08,
    SystemFlagsInformation                = 0x09,
    SystemCallTimeInformation                 = 0x0A,
    SystemModuleInformation                   = 0x0B,
    SystemLocksInformation                = 0x0C,
    SystemStackTraceInformation               = 0x0D,
    SystemPagedPoolInformation                = 0x0E,
    SystemNonPagedPoolInformation             = 0x0F,
    SystemHandleInformation                   = 0x10,
    SystemObjectInformation                   = 0x11,
    SystemPageFileInformation                 = 0x12,
    SystemVdmInstemulInformation              = 0x13,
    SystemVdmBopInformation                   = 0x14,
    SystemFileCacheInformation                = 0x15,
    SystemPoolTagInformation                  = 0x16,
    SystemInterruptInformation                = 0x17,
    SystemDpcBehaviorInformation              = 0x18,
    SystemFullMemoryInformation               = 0x19,
    SystemLoadGdiDriverInformation            = 0x1A,
    SystemUnloadGdiDriverInformation              = 0x1B,
    SystemTimeAdjustmentInformation               = 0x1C,
    SystemSummaryMemoryInformation            = 0x1D,
    SystemMirrorMemoryInformation             = 0x1E,
    SystemPerformanceTraceInformation             = 0x1F,
    SystemObsolete0                       = 0x20,
    SystemExceptionInformation                = 0x21,
    SystemCrashDumpStateInformation               = 0x22,
    SystemKernelDebuggerInformation               = 0x23,
    SystemContextSwitchInformation            = 0x24,
    SystemRegistryQuotaInformation            = 0x25,
    SystemExtendServiceTableInformation           = 0x26,
    SystemPrioritySeperation                  = 0x27,
    SystemVerifierAddDriverInformation            = 0x28,
    SystemVerifierRemoveDriverInformation         = 0x29,
    SystemProcessorIdleInformation            = 0x2A,
    SystemLegacyDriverInformation             = 0x2B,
    SystemCurrentTimeZoneInformation              = 0x2C,
    SystemLookasideInformation                = 0x2D,
    SystemTimeSlipNotification                = 0x2E,
    SystemSessionCreate                   = 0x2F,
    SystemSessionDetach                   = 0x30,
    SystemSessionInformation                  = 0x31,
    SystemRangeStartInformation               = 0x32,
    SystemVerifierInformation                 = 0x33,
    SystemVerifierThunkExtend                 = 0x34,
    SystemSessionProcessInformation               = 0x35,
    SystemLoadGdiDriverInSystemSpace              = 0x36,
    SystemNumaProcessorMap                = 0x37,
    SystemPrefetcherInformation               = 0x38,
    SystemExtendedProcessInformation              = 0x39,
    SystemRecommendedSharedDataAlignment          = 0x3A,
    SystemComPlusPackage                  = 0x3B,
    SystemNumaAvailableMemory                 = 0x3C,
    SystemProcessorPowerInformation               = 0x3D,
    SystemEmulationBasicInformation               = 0x3E,
    SystemEmulationProcessorInformation           = 0x3F,
    SystemExtendedHandleInformation               = 0x40,
    SystemLostDelayedWriteInformation             = 0x41,
    SystemBigPoolInformation                  = 0x42,
    SystemSessionPoolTagInformation               = 0x43,
    SystemSessionMappedViewInformation            = 0x44,
    SystemHotpatchInformation                 = 0x45,
    SystemObjectSecurityMode                  = 0x46,
    SystemWatchdogTimerHandler                = 0x47,
    SystemWatchdogTimerInformation            = 0x48,
    SystemLogicalProcessorInformation             = 0x49,
    SystemWow64SharedInformationObsolete          = 0x4A,
    SystemRegisterFirmwareTableInformationHandler     = 0x4B,
    SystemFirmwareTableInformation            = 0x4C,
    SystemModuleInformationEx                 = 0x4D,
    SystemVerifierTriageInformation               = 0x4E,
    SystemSuperfetchInformation               = 0x4F,
    SystemMemoryListInformation               = 0x50,
    SystemFileCacheInformationEx              = 0x51,
    SystemThreadPriorityClientIdInformation           = 0x52,
    SystemProcessorIdleCycleTimeInformation           = 0x53,
    SystemVerifierCancellationInformation         = 0x54,
    SystemProcessorPowerInformationEx             = 0x55,
    SystemRefTraceInformation                 = 0x56,
    SystemSpecialPoolInformation              = 0x57,
    SystemProcessIdInformation                = 0x58,
    SystemErrorPortInformation                = 0x59,
    SystemBootEnvironmentInformation              = 0x5A,
    SystemHypervisorInformation               = 0x5B,
    SystemVerifierInformationEx               = 0x5C,
    SystemTimeZoneInformation                 = 0x5D,
    SystemImageFileExecutionOptionsInformation        = 0x5E,
    SystemCoverageInformation                 = 0x5F,
    SystemPrefetchPatchInformation            = 0x60,
    SystemVerifierFaultsInformation               = 0x61,
    SystemSystemPartitionInformation              = 0x62,
    SystemSystemDiskInformation               = 0x63,
    SystemProcessorPerformanceDistribution        = 0x64,
    SystemNumaProximityNodeInformation            = 0x65,
    SystemDynamicTimeZoneInformation              = 0x66,
    SystemCodeIntegrityInformation            = 0x67,
    SystemProcessorMicrocodeUpdateInformation         = 0x68,
    SystemProcessorBrandString                = 0x69,
    SystemVirtualAddressInformation               = 0x6A,
    SystemLogicalProcessorAndGroupInformation         = 0x6B,
    SystemProcessorCycleTimeInformation           = 0x6C,
    SystemStoreInformation                = 0x6D,
    SystemRegistryAppendString                = 0x6E,
    SystemAitSamplingValue                = 0x6F,
    SystemVhdBootInformation                  = 0x70,
    SystemCpuQuotaInformation                 = 0x71,
    SystemNativeBasicInformation              = 0x72,
    SystemErrorPortTimeouts                   = 0x73,
    SystemLowPriorityIoInformation            = 0x74,
    SystemBootEntropyInformation              = 0x75,
    SystemVerifierCountersInformation             = 0x76,
    SystemPagedPoolInformationEx              = 0x77,
    SystemSystemPtesInformationEx             = 0x78,
    SystemNodeDistanceInformation             = 0x79,
    SystemAcpiAuditInformation                = 0x7A,
    SystemBasicPerformanceInformation             = 0x7B,
    SystemQueryPerformanceCounterInformation          = 0x7C,
    SystemSessionBigPoolInformation               = 0x7D,
    SystemBootGraphicsInformation             = 0x7E,
    SystemScrubPhysicalMemoryInformation          = 0x7F,
    SystemBadPageInformation                  = 0x80,
    SystemProcessorProfileControlArea             = 0x81,
    SystemCombinePhysicalMemoryInformation        = 0x82,
    SystemEntropyInterruptTimingInformation           = 0x83,
    SystemConsoleInformation                  = 0x84,
    SystemPlatformBinaryInformation               = 0x85,
    SystemPolicyInformation                   = 0x86,
    SystemHypervisorProcessorCountInformation         = 0x87,
    SystemDeviceDataInformation               = 0x88,
    SystemDeviceDataEnumerationInformation        = 0x89,
    SystemMemoryTopologyInformation               = 0x8A,
    SystemMemoryChannelInformation            = 0x8B,
    SystemBootLogoInformation                 = 0x8C,
    SystemProcessorPerformanceInformationEx           = 0x8D,
    SystemCriticalProcessErrorLogInformation          = 0x8E,
    SystemSecureBootPolicyInformation             = 0x8F,
    SystemPageFileInformationEx               = 0x90,
    SystemSecureBootInformation               = 0x91,
    SystemEntropyInterruptTimingRawInformation        = 0x92,
    SystemPortableWorkspaceEfiLauncherInformation     = 0x93,
    SystemFullProcessInformation              = 0x94,
    SystemKernelDebuggerInformationEx             = 0x95,
    SystemBootMetadataInformation             = 0x96,
    SystemSoftRebootInformation               = 0x97,
    SystemElamCertificateInformation              = 0x98,
    SystemOfflineDumpConfigInformation            = 0x99,
    SystemProcessorFeaturesInformation            = 0x9A,
    SystemRegistryReconciliationInformation           = 0x9B,
    SystemEdidInformation                 = 0x9C,
    SystemManufacturingInformation            = 0x9D,
    SystemEnergyEstimationConfigInformation           = 0x9E,
    SystemHypervisorDetailInformation             = 0x9F,
    SystemProcessorCycleStatsInformation          = 0xA0,
    SystemVmGenerationCountInformation            = 0xA1,
    SystemTrustedPlatformModuleInformation        = 0xA2,
    SystemKernelDebuggerFlags                 = 0xA3,
    SystemCodeIntegrityPolicyInformation          = 0xA4,
    SystemIsolatedUserModeInformation             = 0xA5,
    SystemHardwareSecurityTestInterfaceResultsInformation = 0xA6,
    SystemSingleModuleInformation             = 0xA7,
    SystemAllowedCpuSetsInformation               = 0xA8,
    SystemDmaProtectionInformation            = 0xA9,
    SystemInterruptCpuSetsInformation             = 0xAA,
    SystemSecureBootPolicyFullInformation         = 0xAB,
    SystemCodeIntegrityPolicyFullInformation          = 0xAC,
    SystemAffinitizedInterruptProcessorInformation    = 0xAD,
    SystemRootSiloInformation                 = 0xAE,
    SystemCpuSetInformation                   = 0xAF,
    SystemCpuSetTagInformation                = 0xB0,
    SystemWin32WerStartCallout                = 0xB1,
    SystemSecureKernelProfileInformation          = 0xB2,
    SystemCodeIntegrityPlatformManifestInformation    = 0xB3,
    SystemInterruptSteeringInformation            = 0xB4,
    SystemSuppportedProcessorArchitectures        = 0xB5,
    SystemMemoryUsageInformation              = 0xB6,
    SystemCodeIntegrityCertificateInformation         = 0xB7,
    SystemPhysicalMemoryInformation               = 0xB8,
    SystemControlFlowTransition               = 0xB9,
    SystemKernelDebuggingAllowed              = 0xBA,
    SystemActivityModerationExeState              = 0xBB,
    SystemActivityModerationUserSettings          = 0xBC,
    SystemCodeIntegrityPoliciesFullInformation        = 0xBD,
    SystemCodeIntegrityUnlockInformation          = 0xBE,
    SystemIntegrityQuotaInformation               = 0xBF,
    SystemFlushInformation                = 0xC0,
    SystemProcessorIdleMaskInformation            = 0xC1,
    SystemSecureDumpEncryptionInformation         = 0xC2,
    SystemWriteConstraintInformation              = 0xC3,
    SystemKernelVaShadowInformation               = 0xC4,
    SystemHypervisorSharedPageInformation         = 0xC5,
    SystemFirmwareBootPerformanceInformation          = 0xC6,
    SystemCodeIntegrityVerificationInformation        = 0xC7,
    SystemFirmwarePartitionInformation            = 0xC8,
    SystemSpeculationControlInformation           = 0xC9,
    SystemDmaGuardPolicyInformation               = 0xCA,
    SystemEnclaveLaunchControlInformation         = 0xCB,
    SystemWorkloadAllowedCpuSetsInformation           = 0xCC,
    SystemCodeIntegrityUnlockModeInformation          = 0xCD,
    SystemLeapSecondInformation               = 0xCE,
    SystemFlags2Information                   = 0xCF,
    SystemSecurityModelInformation            = 0xD0,
    SystemCodeIntegritySyntheticCacheInformation      = 0xD1,
    MaxSystemInfoClass                    = 0xD2
}

VB Signature:

Declare Function SYSTEM_INFORMATION_CLASS Lib "ntdll.dll" (TODO) As TODO

User-Defined Types:

None.

Notes:

None.

Documentation

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