Contains status information for a service. The ControlService, EnumDependentServices, EnumServicesStatus, and QueryServiceStatus functions use this structure. A service uses this structure in the SetServiceStatus function to report its current status to the service control manager.

Syntax

typedef struct _SERVICE_STATUS {
  DWORD dwServiceType;
  DWORD dwCurrentState;
  DWORD dwControlsAccepted;
  DWORD dwWin32ExitCode;
  DWORD dwServiceSpecificExitCode;
  DWORD dwCheckPoint;
  DWORD dwWaitHint;
}SERVICE_STATUS, *LPSERVICE_STATUS;

Members

dwServiceType

The type of service. This member can be one of the following values.

Value	Meaning
SERVICE_FILE_SYSTEM_DRIVER 0x00000002	The service is a file system driver.
SERVICE_KERNEL_DRIVER 0x00000001	The service is a device driver.
SERVICE_WIN32_OWN_PROCESS 0x00000010	The service runs in its own process.
SERVICE_WIN32_SHARE_PROCESS 0x00000020	The service shares a process with other services.

 

If the service type is either SERVICE_WIN32_OWN_PROCESS or SERVICE_WIN32_SHARE_PROCESS, and the service is running in the context of the LocalSystem account, the following type may also be specified.

Value	Meaning
SERVICE_INTERACTIVE_PROCESS 0x00000100	The service can interact with the desktop. For more information, see Interactive Services.

 

dwCurrentState

The current state of the service. This member can be one of the following values.

Value	Meaning
SERVICE_CONTINUE_PENDING 0x00000005	The service continue is pending.
SERVICE_PAUSE_PENDING 0x00000006	The service pause is pending.
SERVICE_PAUSED 0x00000007	The service is paused.
SERVICE_RUNNING 0x00000004	The service is running.
SERVICE_START_PENDING 0x00000002	The service is starting.
SERVICE_STOP_PENDING 0x00000003	The service is stopping.
SERVICE_STOPPED 0x00000001	The service is not running.

 

dwControlsAccepted

The control codes the service accepts and processes in its handler function (see Handler and HandlerEx). A user interface process can control a service by specifying a control command in the ControlService or ControlServiceEx function. By default, all services accept the SERVICE_CONTROL_INTERROGATE value.

The following are the control codes.

Control code	Meaning
SERVICE_ACCEPT_NETBINDCHANGE 0x00000010	The service is a network component that can accept changes in its binding without being stopped and restarted. This control code allows the service to receive SERVICE_CONTROL_NETBINDADD, SERVICE_CONTROL_NETBINDREMOVE, SERVICE_CONTROL_NETBINDENABLE, and SERVICE_CONTROL_NETBINDDISABLE notifications.
SERVICE_ACCEPT_PARAMCHANGE 0x00000008	The service can reread its startup parameters without being stopped and restarted. This control code allows the service to receive SERVICE_CONTROL_PARAMCHANGE notifications.
SERVICE_ACCEPT_PAUSE_CONTINUE 0x00000002	The service can be paused and continued. This control code allows the service to receive SERVICE_CONTROL_PAUSE and SERVICE_CONTROL_CONTINUE notifications.
SERVICE_ACCEPT_PRESHUTDOWN 0x00000100	The service can perform preshutdown tasks. This control code enables the service to receive SERVICE_CONTROL_PRESHUTDOWN notifications. Note that ControlService and ControlServiceEx cannot send this notification; only the system can send it. Windows Server 2003 and Windows XP/2000:  This value is not supported.
SERVICE_ACCEPT_SHUTDOWN 0x00000004	The service is notified when system shutdown occurs. This control code allows the service to receive SERVICE_CONTROL_SHUTDOWN notifications. Note that ControlService and ControlServiceEx cannot send this notification; only the system can send it.
SERVICE_ACCEPT_STOP 0x00000001	The service can be stopped. This control code allows the service to receive SERVICE_CONTROL_STOP notifications.

 

This member can also contain the following extended control codes, which are supported only by HandlerEx. (Note that these control codes cannot be sent by ControlService or ControlServiceEx.)

Control code	Meaning
SERVICE_ACCEPT_HARDWAREPROFILECHANGE 0x00000020	The service is notified when the computer's hardware profile has changed. This enables the system to send SERVICE_CONTROL_HARDWAREPROFILECHANGE notifications to the service.
SERVICE_ACCEPT_POWEREVENT 0x00000040	The service is notified when the computer's power status has changed. This enables the system to send SERVICE_CONTROL_POWEREVENT notifications to the service.
SERVICE_ACCEPT_SESSIONCHANGE 0x00000080	The service is notified when the computer's session status has changed. This enables the system to send SERVICE_CONTROL_SESSIONCHANGE notifications to the service. Windows 2000:  This value is not supported.
SERVICE_ACCEPT_TIMECHANGE 0x00000200	The service is notified when the system time has changed. This enables the system to send SERVICE_CONTROL_TIMECHANGE notifications to the service. Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP/2000:  This control code is not supported.
SERVICE_ACCEPT_TRIGGEREVENT 0x00000400	The service is notified when an event for which the service has registered occurs. This enables the system to send SERVICE_CONTROL_TRIGGEREVENT notifications to the service. Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP/2000:  This control code is not supported.

 

dwWin32ExitCode

The error code the service uses to report an error that occurs when it is starting or stopping. To return an error code specific to the service, the service must set this value to ERROR_SERVICE_SPECIFIC_ERROR to indicate that the dwServiceSpecificExitCode member contains the error code. The service should set this value to NO_ERROR when it is running and on normal termination.

dwServiceSpecificExitCode

A service-specific error code that the service returns when an error occurs while the service is starting or stopping. This value is ignored unless the dwWin32ExitCode member is set to ERROR_SERVICE_SPECIFIC_ERROR.

dwCheckPoint

The check-point value the service increments periodically to report its progress during a lengthy start, stop, pause, or continue operation. For example, the service should increment this value as it completes each step of its initialization when it is starting up. The user interface program that invoked the operation on the service uses this value to track the progress of the service during a lengthy operation. This value is not valid and should be zero when the service does not have a start, stop, pause, or continue operation pending.

dwWaitHint

The estimated time required for a pending start, stop, pause, or continue operation, in milliseconds. Before the specified amount of time has elapsed, the service should make its next call to the SetServiceStatus function with either an incremented dwCheckPoint value or a change in dwCurrentState. If the amount of time specified by dwWaitHint passes, and dwCheckPoint has not been incremented or dwCurrentState has not changed, the service control manager or service control program can assume that an error has occurred and the service should be stopped. However, if the service shares a process with other services, the service control manager cannot terminate the service application because it would have to terminate the other services sharing the process as well.

Examples

For an example, see Writing a ServiceMain Function.

Requirements

See Also

ControlService

ControlServiceEx

EnumDependentServices

EnumServicesStatus

QueryServiceStatus

SetServiceStatus

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Build date: 10/8/2009