Win32Service Service Flag Constants
Win32 Base Priority Classes
Predefined Constants
PHP Manual

Win32 Error Codes
Constant | Value | Description
--- | --- | ---
`WIN32_ERROR_ACCESS_DENIED` | 0x00000005 | The handle to the SCM database does not have the appropriate access rights.
`WIN32_ERROR_CIRCULAR_DEPENDENCY` | 0x00000423 | A circular service dependency was specified.
`WIN32_ERROR_DATABASE_DOES_NOT_EXIST` | 0x00000429 | The specified database does not exist.
`WIN32_ERROR_DEPENDENT_SERVICES_RUNNING` | 0x0000041B | The service cannot be stopped because other running services are dependent on it.
`WIN32_ERROR_DUPLICATE_SERVICE_NAME` | 0x00000436 | The display name already exists in the service control manager database either as a service name or as another display name.
`WIN32_ERROR_FAILED_SERVICE_CONTROLLER_CONNECT` | 0x00000427 | This error is returned if the program is being run as a console application rather than as a service. If the program will be run as a console application for debugging purposes, structure it such that service-specific code is not called.
`WIN32_ERROR_INSUFFICIENT_BUFFER` | 0x0000007A | The buffer is too small for the service status structure. Nothing was written to the structure.
`WIN32_ERROR_INVALID_DATA` | 0x0000000D | The specified service status structure is invalid.
`WIN32_ERROR_INVALID_HANDLE` | 0x00000006 | The handle to the specified service control manager database is invalid.
`WIN32_ERROR_INVALID_LEVEL` | 0x0000007C | The InfoLevel parameter contains an unsupported value.
`WIN32_ERROR_INVALID_NAME` | 0x0000007B | The specified service name is invalid.
`WIN32_ERROR_INVALID_PARAMETER` | 0x00000057 | A parameter that was specified is invalid.
`WIN32_ERROR_INVALID_SERVICE_ACCOUNT` | 0x00000421 | The user account name specified in the `user` parameter does not exist. See win32_create_service().
`WIN32_ERROR_INVALID_SERVICE_CONTROL` | 0x0000041C | The requested control code is not valid, or it is unacceptable to the service.
`WIN32_ERROR_PATH_NOT_FOUND` | 0x00000003 | The service binary file could not be found.
`WIN32_ERROR_SERVICE_ALREADY_RUNNING` | 0x00000420 | An instance of the service is already running.
`WIN32_ERROR_SERVICE_CANNOT_ACCEPT_CTRL` | 0x00000425 | The requested control code cannot be sent to the service because the state of the service is `WIN32_SERVICE_STOPPED`, `WIN32_SERVICE_START_PENDING`, or `WIN32_SERVICE_STOP_PENDING`.
`WIN32_ERROR_SERVICE_DATABASE_LOCKED` | 0x0000041F | The database is locked.
`WIN32_ERROR_SERVICE_DEPENDENCY_DELETED` | 0x00000433 | The service depends on a service that does not exist or has been marked for deletion.
`WIN32_ERROR_SERVICE_DEPENDENCY_FAIL` | 0x0000042C | The service depends on another service that has failed to start.
`WIN32_ERROR_SERVICE_DISABLED` | 0x00000422 | The service has been disabled.
`WIN32_ERROR_SERVICE_DOES_NOT_EXIST` | 0x00000424 | The specified service does not exist as an installed service.
`WIN32_ERROR_SERVICE_EXISTS` | 0x00000431 | The specified service already exists in this database.
`WIN32_ERROR_SERVICE_LOGON_FAILED` | 0x0000042D | The service did not start due to a logon failure. This error occurs if the service is configured to run under an account that does not have the "Log on as a service" right.
`WIN32_ERROR_SERVICE_MARKED_FOR_DELETE` | 0x00000430 | The specified service has already been marked for deletion.
`WIN32_ERROR_SERVICE_NO_THREAD` | 0x0000041E | A thread could not be created for the service.
`WIN32_ERROR_SERVICE_NOT_ACTIVE` | 0x00000426 | The service has not been started.
`WIN32_ERROR_SERVICE_REQUEST_TIMEOUT` | 0x0000041D | The process for the service was started, but it did not call StartServiceCtrlDispatcher, or the thread that called StartServiceCtrlDispatcher may be blocked in a control handler function.
`WIN32_ERROR_SHUTDOWN_IN_PROGRESS` | 0x0000045B | The system is shutting down; this function cannot be called.
`WIN32_NO_ERROR` | 0x00000000 | No error.

Win32Service Service Flag Constants
Win32 Base Priority Classes
Predefined Constants
PHP Manual