Playing around with WinDbg, I'm wondering how to view details of every Process object instance (I'm assuming there is more than one).

WinDbg reports I have an object named: ntkrnlmp!_EPROCESS

with members:

   +0x000 Pcb              : _KPROCESS
   +0x160 ProcessLock      : _EX_PUSH_LOCK
   +0x168 CreateTime       : _LARGE_INTEGER
   +0x170 ExitTime         : _LARGE_INTEGER
   +0x178 RundownProtect   : _EX_RUNDOWN_REF
   +0x180 UniqueProcessId  : Ptr64 Void
   +0x188 ActiveProcessLinks : _LIST_ENTRY
   +0x198 ProcessQuotaUsage : [2] Uint8B
   +0x1a8 ProcessQuotaPeak : [2] Uint8B
   +0x1b8 CommitCharge     : Uint8B
   +0x1c0 QuotaBlock       : Ptr64 _EPROCESS_QUOTA_BLOCK
   +0x1c8 CpuQuotaBlock    : Ptr64 _PS_CPU_QUOTA_BLOCK
   +0x1d0 PeakVirtualSize  : Uint8B
   +0x1d8 VirtualSize      : Uint8B
   +0x1e0 SessionProcessLinks : _LIST_ENTRY
   +0x1f0 DebugPort        : Ptr64 Void
   +0x1f8 ExceptionPortData : Ptr64 Void
   +0x1f8 ExceptionPortValue : Uint8B
   +0x1f8 ExceptionPortState : Pos 0, 3 Bits
   +0x200 ObjectTable      : Ptr64 _HANDLE_TABLE
   +0x208 Token            : _EX_FAST_REF
   +0x210 WorkingSetPage   : Uint8B
   +0x218 AddressCreationLock : _EX_PUSH_LOCK
   +0x220 RotateInProgress : Ptr64 _ETHREAD
   +0x228 ForkInProgress   : Ptr64 _ETHREAD
   +0x230 HardwareTrigger  : Uint8B
   +0x238 PhysicalVadRoot  : Ptr64 _MM_AVL_TABLE
   +0x240 CloneRoot        : Ptr64 Void
   +0x248 NumberOfPrivatePages : Uint8B
   +0x250 NumberOfLockedPages : Uint8B
   +0x258 Win32Process     : Ptr64 Void
   +0x260 Job              : Ptr64 _EJOB
   +0x268 SectionObject    : Ptr64 Void
   +0x270 SectionBaseAddress : Ptr64 Void
   +0x278 Cookie           : Uint4B
   +0x27c UmsScheduledThreads : Uint4B
   +0x280 WorkingSetWatch  : Ptr64 _PAGEFAULT_HISTORY
   +0x288 Win32WindowStation : Ptr64 Void
   +0x290 InheritedFromUniqueProcessId : Ptr64 Void
   +0x298 LdtInformation   : Ptr64 Void
   +0x2a0 Spare            : Ptr64 Void
   +0x2a8 ConsoleHostProcess : Uint8B
   +0x2b0 DeviceMap        : Ptr64 Void
   +0x2b8 EtwDataSource    : Ptr64 Void
   +0x2c0 FreeTebHint      : Ptr64 Void
   +0x2c8 FreeUmsTebHint   : Ptr64 Void
   +0x2d0 PageDirectoryPte : _HARDWARE_PTE
   +0x2d0 Filler           : Uint8B
   +0x2d8 Session          : Ptr64 Void
   +0x2e0 ImageFileName    : [15] UChar
   +0x2ef PriorityClass    : UChar
   +0x2f0 JobLinks         : _LIST_ENTRY
   +0x300 LockedPagesList  : Ptr64 Void
   +0x308 ThreadListHead   : _LIST_ENTRY
   +0x318 SecurityPort     : Ptr64 Void
   +0x320 Wow64Process     : Ptr64 Void
   +0x328 ActiveThreads    : Uint4B
   +0x32c ImagePathHash    : Uint4B
   +0x330 DefaultHardErrorProcessing : Uint4B
   +0x334 LastThreadExitStatus : Int4B
   +0x338 Peb              : Ptr64 _PEB
   +0x340 PrefetchTrace    : _EX_FAST_REF
   +0x348 ReadOperationCount : _LARGE_INTEGER
   +0x350 WriteOperationCount : _LARGE_INTEGER
   +0x358 OtherOperationCount : _LARGE_INTEGER
   +0x360 ReadTransferCount : _LARGE_INTEGER
   +0x368 WriteTransferCount : _LARGE_INTEGER
   +0x370 OtherTransferCount : _LARGE_INTEGER
   +0x378 CommitChargeLimit : Uint8B
   +0x380 CommitChargePeak : Uint8B
   +0x388 AweInfo          : Ptr64 Void
   +0x390 SeAuditProcessCreationInfo : _SE_AUDIT_PROCESS_CREATION_INFO
   +0x398 Vm               : _MMSUPPORT
   +0x420 MmProcessLinks   : _LIST_ENTRY
   +0x430 HighestUserAddress : Ptr64 Void
   +0x438 ModifiedPageCount : Uint4B
   +0x43c Flags2           : Uint4B
   +0x43c JobNotReallyActive : Pos 0, 1 Bit
   +0x43c AccountingFolded : Pos 1, 1 Bit
   +0x43c NewProcessReported : Pos 2, 1 Bit
   +0x43c ExitProcessReported : Pos 3, 1 Bit
   +0x43c ReportCommitChanges : Pos 4, 1 Bit
   +0x43c LastReportMemory : Pos 5, 1 Bit
   +0x43c ReportPhysicalPageChanges : Pos 6, 1 Bit
   +0x43c HandleTableRundown : Pos 7, 1 Bit
   +0x43c NeedsHandleRundown : Pos 8, 1 Bit
   +0x43c RefTraceEnabled  : Pos 9, 1 Bit
   +0x43c NumaAware        : Pos 10, 1 Bit
   +0x43c ProtectedProcess : Pos 11, 1 Bit
   +0x43c DefaultPagePriority : Pos 12, 3 Bits
   +0x43c PrimaryTokenFrozen : Pos 15, 1 Bit
   +0x43c ProcessVerifierTarget : Pos 16, 1 Bit
   +0x43c StackRandomizationDisabled : Pos 17, 1 Bit
   +0x43c AffinityPermanent : Pos 18, 1 Bit
   +0x43c AffinityUpdateEnable : Pos 19, 1 Bit
   +0x43c PropagateNode    : Pos 20, 1 Bit
   +0x43c ExplicitAffinity : Pos 21, 1 Bit
   +0x43c Spare1           : Pos 22, 1 Bit
   +0x43c ForceRelocateImages : Pos 23, 1 Bit
   +0x43c DisallowStrippedImages : Pos 24, 1 Bit
   +0x440 Flags            : Uint4B
   +0x440 CreateReported   : Pos 0, 1 Bit
   +0x440 NoDebugInherit   : Pos 1, 1 Bit
   +0x440 ProcessExiting   : Pos 2, 1 Bit
   +0x440 ProcessDelete    : Pos 3, 1 Bit
   +0x440 Wow64SplitPages  : Pos 4, 1 Bit
   +0x440 VmDeleted        : Pos 5, 1 Bit
   +0x440 OutswapEnabled   : Pos 6, 1 Bit
   +0x440 Outswapped       : Pos 7, 1 Bit
   +0x440 ForkFailed       : Pos 8, 1 Bit
   +0x440 Wow64VaSpace4Gb  : Pos 9, 1 Bit
   +0x440 AddressSpaceInitialized : Pos 10, 2 Bits
   +0x440 SetTimerResolution : Pos 12, 1 Bit
   +0x440 BreakOnTermination : Pos 13, 1 Bit
   +0x440 DeprioritizeViews : Pos 14, 1 Bit
   +0x440 WriteWatch       : Pos 15, 1 Bit
   +0x440 ProcessInSession : Pos 16, 1 Bit
   +0x440 OverrideAddressSpace : Pos 17, 1 Bit
   +0x440 HasAddressSpace  : Pos 18, 1 Bit
   +0x440 LaunchPrefetched : Pos 19, 1 Bit
   +0x440 InjectInpageErrors : Pos 20, 1 Bit
   +0x440 VmTopDown        : Pos 21, 1 Bit
   +0x440 ImageNotifyDone  : Pos 22, 1 Bit
   +0x440 PdeUpdateNeeded  : Pos 23, 1 Bit
   +0x440 VdmAllowed       : Pos 24, 1 Bit
   +0x440 CrossSessionCreate : Pos 25, 1 Bit
   +0x440 ProcessInserted  : Pos 26, 1 Bit
   +0x440 DefaultIoPriority : Pos 27, 3 Bits
   +0x440 ProcessSelfDelete : Pos 30, 1 Bit
   +0x440 SetTimerResolutionLink : Pos 31, 1 Bit
   +0x444 ExitStatus       : Int4B
   +0x448 VadRoot          : _MM_AVL_TABLE
   +0x488 AlpcContext      : _ALPC_PROCESS_CONTEXT
   +0x4a8 TimerResolutionLink : _LIST_ENTRY
   +0x4b8 RequestedTimerResolution : Uint4B
   +0x4bc ActiveThreadsHighWatermark : Uint4B
   +0x4c0 SmallestTimerResolution : Uint4B
   +0x4c8 TimerResolutionStackRecord : Ptr64 _PO_DIAG_STACK_RECORD

Am I looking at the right object for viewing information about running user-mode processes? I want to at least see the PID information from it. Any information is helpful (including how to use WinDbg).

The answers to your questions are very involved and call for more of a tutorial rather than a couple of summarised paragraphs.

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