ChangeServiceConfig2A function (winsvc.h)

Changes the optional configuration parameters of a service.

Syntax

BOOL ChangeServiceConfig2A(
  [in]           SC_HANDLE hService,
  [in]           DWORD     dwInfoLevel,
  [in, optional] LPVOID    lpInfo
);

Parameters

[in] hService

A handle to the service. This handle is returned by the OpenService or CreateService function and must have the SERVICE_CHANGE_CONFIG access right. For more information, see Service Security and Access Rights.

If the service controller handles the SC_ACTION_RESTART action, hService must have the SERVICE_START access right.

[in] dwInfoLevel

The configuration information to be changed. This parameter can be one of the following values.

[in, optional] lpInfo

A pointer to the new value to be set for the configuration information. The format of this data depends on the value of the dwInfoLevel parameter. If this value is NULL, the information remains unchanged.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

The ChangeServiceConfig2 function changes the optional configuration information for the specified service in the service control manager database. You can obtain the current optional configuration information by using the QueryServiceConfig2 function.

You cannot set the SERVICE_CONFIG_FAILURE_ACTIONS value for a service that shares the service control manager's process. This includes all services whose executable image is "Services.exe".

You can change and query additional configuration information using the ChangeServiceConfig and QueryServiceConfig functions, respectively.

If a service is configured to restart after it finishes with an error, the service control manager queues the restart action to occur after the specified time delay. A queued restart action cannot be canceled. If the service is manually restarted and then stopped before the queued restart action occurs, the service will restart unexpectedly when the time delay elapses. The service must be explicitly disabled to prevent it from restarting.

The SERVICE_CONFIG_LAUNCH_PROTECTED value can be used to launch the service as protected. In order to launch the service as protected, the service must be signed with a special certificate.

SERVICE_CONFIG_LAUNCH_PROTECTED example:

SERVICE_LAUNCH_PROTECTED_INFO Info;
SC_HANDLE hService;

Info.dwLaunchProtected = SERVICE_LAUNCH_PROTECTED_ANTIMALWARE_LIGHT;

hService = CreateService (...);

if (ChangeServiceConfig2(hService, 
                        SERVICE_CONFIG_LAUNCH_PROTECTED,
                        &Info) == FALSE)
{
    Result = GetLastError();
}

Examples

For an example, see Changing a Service's Configuration.

Requirements

See also

ChangeServiceConfig

CreateService

OpenService

QueryServiceConfig

QueryServiceConfig2

QueryServiceDynamicInformation

SERVICE_DELAYED_AUTO_START_INFO

SERVICE_DESCRIPTION

SERVICE_FAILURE_ACTIONS

SERVICE_FAILURE_ACTIONS_FLAG

SERVICE_PRESHUTDOWN_INFO

SERVICE_REQUIRED_PRIVILEGES_INFO

SERVICE_SID_INFO

Service Configuration

Service Functions