The CreateService function creates a service object and adds it to the specified service control manager database.
SC_HANDLE CreateService(
SC_HANDLE hSCManager, |
// handle to service control manager database |
LPCTSTR lpServiceName, |
// pointer to name of service to start |
LPCTSTR lpDisplayName, |
// pointer to display name |
DWORD dwDesiredAccess, |
// type of access to service |
DWORD dwServiceType, |
// type of service |
DWORD dwStartType, |
// when to start service |
DWORD dwErrorControl, |
// severity if service fails to start |
LPCTSTR lpBinaryPathName, |
// pointer to name of binary file |
LPCTSTR lpLoadOrderGroup, |
// pointer to name of load ordering group |
LPDWORD lpdwTagId, |
// pointer to variable to get tag identifier |
LPCTSTR lpDependencies, |
// pointer to array of dependency names |
LPCTSTR lpServiceStartName, |
// pointer to account name of service |
LPCTSTR lpPassword |
// pointer to password for service account |
); |
The STANDARD_RIGHTS_REQUIRED constant enables the following service object access types:
Standard rights |
Description |
DELETE |
Enables calling of the DeleteService function to delete the service. |
READ_CONTROL |
Enables calling of the QueryServiceObjectSecurity function to query the security descriptor of the service object. |
WRITE_DAC|WRITE_OWNER |
Enables calling of the SetServiceObjectSecurity function to modify the security descriptor of the service object. |
You can specify any or all of the following service object access types:
Access |
Description |
SERVICE_ALL_ACCESS |
Includes STANDARD_RIGHTS_REQUIRED in addition to all of the access types listed in this table. |
SERVICE_CHANGE_CONFIG |
Enables calling of the ChangeServiceConfig function to change the service configuration. |
SERVICE_ENUMERATE_DEPENDENTS |
Enables calling of the EnumDependentServices function to enumerate all the services dependent on the service. |
SERVICE_INTERROGATE |
Enables calling of the ControlService function to ask the service to report its status immediately. |
SERVICE_PAUSE_CONTINUE |
Enables calling of the ControlService function to pause or continue the service. |
SERVICE_QUERY_CONFIG |
Enables calling of the QueryServiceConfig function to query the service configuration. |
SERVICE_QUERY_STATUS |
Enables calling of the QueryServiceStatus function to ask the service control manager about the status of the service. |
SERVICE_START |
Enables calling of the StartService function to start the service. |
SERVICE_STOP |
Enables calling of the ControlService function to stop the service. |
SERVICE_USER_DEFINED_CONTROL |
Enables calling of the ControlService function to specify a user-defined control code. |
You can specify any of the following generic access types:
Generic access |
Service access |
GENERIC_READ |
Combines the following access types: STANDARD_RIGHTS_READ, SERVICE_QUERY_CONFIG, SERVICE_QUERY_STATUS, and SERVICE_ENUMERATE_DEPENDENTS. |
GENERIC_WRITE |
Combines the following access types: STANDARD_RIGHTS_WRITE and SERVICE_CHANGE_CONFIG. |
GENERIC_EXECUTE |
Combines the following access types: STANDARD_RIGHTS_EXECUTE, SERVICE_START, SERVICE_STOP, SERVICE_PAUSE_CONTINUE, SERVICE_INTERROGATE, and SERVICE_USER_DEFINED_CONTROL. |
Value |
Meaning |
SERVICE_WIN32_OWN_PROCESS |
Specifies a Win32-based service that runs in its own process. |
SERVICE_WIN32_SHARE_PROCESS |
Specifies a Win32-based service that shares a process with other services. |
SERVICE_KERNEL_DRIVER |
Specifies a driver service. |
SERVICE_FILE_SYSTEM_DRIVER |
Specifies a file system driver service. |
If you specify either SERVICE_WIN32_OWN_PROCESS or SERVICE_WIN32_SHARE_PROCESS, you can also specify the following flag.
Value |
Meaning |
SERVICE_INTERACTIVE_PROCESS |
Enables a Win32-based service process to interact with the desktop. |
Value |
Meaning |
SERVICE_BOOT_START |
Specifies a device driver started by the operating system loader. This value is valid only for driver services. |
SERVICE_SYSTEM_START |
Specifies a device driver started by the IoInitSystem function. This value is valid only for driver services. |
SERVICE_AUTO_START |
Specifies a service to be started automatically by the service control manager during system startup. |
SERVICE_DEMAND_START |
Specifies a service to be started by the service control manager when a process calls the StartService function. |
SERVICE_DISABLED |
Specifies a service that can no longer be started. |
Value |
Meaning |
SERVICE_ERROR_IGNORE |
The startup program logs the error but continues the startup operation. |
SERVICE_ERROR_NORMAL |
The startup program logs the error and puts up a message box pop-up but continues the startup operation. |
SERVICE_ERROR_SEVERE |
The startup program logs the error. If the last-known-good configuration is being started, the startup operation continues. Otherwise, the system is restarted with the last-known-good configuration. |
SERVICE_ERROR_CRITICAL |
The startup program logs the error, if possible. If the last-known-good configuration is being started, the startup operation fails. Otherwise, the system is restarted with the last-known good configuration. |
You can use a tag for ordering service startup within a load ordering group by specifying a tag order vector in the GroupOrderList value of the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control
Tags are only evaluated for driver services that have SERVICE_BOOT_START or
SERVICE_SYSTEM_START start types.
You must prefix group names with SC_GROUP_IDENTIFIER so that they can be
distinguished from a service name, because services and service groups share
the same name space.
If the service type is SERVICE_KERNEL_DRIVER or SERVICE_FILE_SYSTEM_DRIVER,
the name is the driver object name that the system uses to load the device
driver. Specify NULL if the driver is to use a default object name created by
the I/O system.
If the function succeeds, the return value is a handle to the service.
If the function fails, the return value is NULL. To get extended error information, call GetLastError.
The following error codes can be set by the service control manager. Other error codes can be set by the registry functions that are called by the service control manager.
Value |
Meaning |
ERROR_ACCESS_DENIED |
The handle to the specified service control manager database does not have SC_MANAGER_CREATE_SERVICE access. |
ERROR_CIRCULAR_DEPENDENCY |
A circular service dependency was specified. |
ERROR_DUP_NAME |
The display name already exists in the service control manager database either as a service name or as another display name. |
ERROR_INVALID_HANDLE |
The handle to the specified service control manager database is invalid. |
ERROR_INVALID_NAME |
The specified service name is invalid. |
ERROR_INVALID_PARAMETER |
A parameter that was specified is invalid. |
ERROR_INVALID_SERVICE_ACCOUNT |
The user account name specified in the lpServiceStartName parameter does not exist. |
ERROR_SERVICE_EXISTS |
The specified service already exists in this database. |
The CreateService function creates a service object and installs it in the service control manager database by creating a key with the same name as the service under the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services
Information specified for this function is saved as values under this key. Setup programs and the service itself can create subkeys under this key for any service specific information.
The returned handle is only valid for the process that called CreateService. It can be closed by calling the CloseServiceHandle function.
ChangeServiceConfig, CloseServiceHandle, ControlService, DeleteService, EnumDependentServices, OpenSCManager, QueryServiceConfig, QueryServiceObjectSecurity, QueryServiceStatus, SetServiceObjectSecurity, StartService
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