2.1 HRESULT

The HRESULT numbering space is vendor-extensible. Vendors can supply their own values for this field, as long as the C bit (0x20000000) is set, indicating it is a customer code.

The HRESULT numbering space has the following internal structure. Any protocol that uses NTSTATUS values on the wire is responsible for stating the order in which the bytes are placed on the wire.


0


1


2


3


4


5


6


7


8


9

1
0


1


2


3


4


5


6


7


8


9

2
0


1


2


3


4


5


6


7


8


9

3
0


1

S

R

C

N

X

Facility

Code

S (1 bit): Severity. If set, indicates a failure result. If clear, indicates a success result.

R (1 bit): Reserved. If the N bit is clear, this bit MUST be set to 0. If the N bit is set, this bit is defined by the NTSTATUS numbering space (as specified in section 2.3).

C (1 bit): Customer. This bit specifies if the value is customer-defined or Microsoft-defined. The bit is set for customer-defined values and clear for Microsoft-defined values.<1>

N (1 bit): If set, indicates that the error code is an NTSTATUS value (as specified in section 2.3), except that this bit is set.

X (1 bit):  Reserved.  SHOULD be set to 0. <2>

Facility (11 bits): An indicator of the source of the error. New facilities are occasionally added by Microsoft.

The following table lists the currently defined facility codes:

Value

Meaning

FACILITY_NULL

0

The default facility code.

FACILITY_RPC

1

The source of the error code is an RPC subsystem.

FACILITY_DISPATCH

2

The source of the error code is a COM Dispatch.

FACILITY_STORAGE

3

The source of the error code is OLE Storage.

FACILITY_ITF

4

The source of the error code is COM/OLE Interface management.

FACILITY_WIN32

7

This region is reserved to map undecorated error codes into HRESULTs.

FACILITY_WINDOWS

8

The source of the error code is the Windows subsystem.

FACILITY_SECURITY

9

The source of the error code is the Security API layer.

FACILITY_SSPI

9

The source of the error code is the Security API layer.

FACILITY_CONTROL

10

The source of the error code is the control mechanism.

FACILITY_CERT

11

The source of the error code is a certificate client or server? 

FACILITY_INTERNET

12

The source of the error code is Wininet related.

FACILITY_MEDIASERVER

13

The source of the error code is the Windows Media Server.

FACILITY_MSMQ

14

The source of the error code is the Microsoft Message Queue.

FACILITY_SETUPAPI

15

The source of the error code is the Setup API.

FACILITY_SCARD

16

The source of the error code is the Smart-card subsystem.

FACILITY_COMPLUS

17

The source of the error code is COM+.

FACILITY_AAF

18

The source of the error code is the Microsoft agent.

FACILITY_URT

19

The source of the error code is .NET CLR.

FACILITY_ACS

20

The source of the error code is the audit collection service.

FACILITY_DPLAY

21

The source of the error code is Direct Play.

FACILITY_UMI

22

The source of the error code is the ubiquitous memoryintrospection service.

FACILITY_SXS

23

The source of the error code is Side-by-side servicing.

FACILITY_WINDOWS_CE

24

The error code is specific to Windows CE.

FACILITY_HTTP

25

The source of the error code is HTTP support.

FACILITY_USERMODE_COMMONLOG

26

The source of the error code is common Logging support.

FACILITY_USERMODE_FILTER_MANAGER

31

The source of the error code is the user mode filter manager.

FACILITY_BACKGROUNDCOPY

32

The source of the error code is background copy control

FACILITY_CONFIGURATION

33

The source of the error code is configuration services.

FACILITY_STATE_MANAGEMENT

34

The source of the error code is state management services.

FACILITY_METADIRECTORY

35

The source of the error code is the Microsoft Identity Server.

FACILITY_WINDOWSUPDATE

36

The source of the error code is a Windows update.

FACILITY_DIRECTORYSERVICE

37

The source of the error code is Active Directory.

FACILITY_GRAPHICS

38

The source of the error code is the graphics drivers.

FACILITY_SHELL

39

The source of the error code is the user Shell.

FACILITY_TPM_SERVICES

40

The source of the error code is the Trusted Platform Module services.

FACILITY_TPM_SOFTWARE

41

The source of the error code is the Trusted Platform Module applications.

FACILITY_PLA

48

The source of the error code is Performance Logs and Alerts

FACILITY_FVE

49

The source of the error code is Full volume encryption.

FACILITY_FWP

50

he source of the error code is the Firewall Platform.

FACILITY_WINRM

51

The source of the error code is the Windows Resource Manager.

FACILITY_NDIS

52

The source of the error code is the Network Driver Interface.

FACILITY_USERMODE_HYPERVISOR

53

The source of the error code is the Usermode Hypervisor components.

FACILITY_CMI

54

The source of the error code is the Configuration Management Infrastructure.

FACILITY_USERMODE_VIRTUALIZATION

55

The source of the error code is the user mode virtualization subsystem.

FACILITY_USERMODE_VOLMGR

56

The source of the error code is  the user mode volume manager

FACILITY_BCD

57

The source of the error code is the Boot Configuration Database.

FACILITY_USERMODE_VHD

58

The source of the error code is user mode virtual hard disk support.

FACILITY_SDIAG

60

The source of the error code is System Diagnostics.

FACILITY_WEBSERVICES

61

The source of the error code is the Web Services.

FACILITY_WINDOWS_DEFENDER

80

The source of the error code is a Windows Defender component.

FACILITY_OPC

81

The source of the error code is the open connectivity service.

Code (2 bytes): The remainder of the error code.

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