Win32Service Service Status Constants
Win32Service Service Control Message Accepted Bitmasks
Predefined Constants
PHP Manual

Win32Service Service Control Message Constants
Constant | Value | Description
--- | --- | ---
`WIN32_SERVICE_CONTROL_CONTINUE` | 0x00000003 | Notifies a paused service that it should resume.
`WIN32_SERVICE_CONTROL_INTERROGATE` | 0x00000004 | Notifies a service that it should report its current status information to the service control manager.
`WIN32_SERVICE_CONTROL_PAUSE` | 0x00000002 | Notifies a service that it should pause.
`WIN32_SERVICE_CONTROL_PRESHUTDOWN` | 0x0000000F | Notifies a service that the system will be shutting down. A service that handles this notification blocks system shutdown until the service stops or the preshutdown time-out interval expires. This value is not supported by Windows Server 2003 and Windows XP/2000.
`WIN32_SERVICE_CONTROL_SHUTDOWN` | 0x00000005 | Notifies a service that the system is shutting down so the service can perform cleanup tasks. If a service accepts this control code, it must stop after it performs its cleanup tasks. After the SCM sends this control code, it will not send other control codes to the service.
`WIN32_SERVICE_CONTROL_STOP` | 0x00000001 | Notifies a service that it should stop.

Win32Service Service Status Constants
Win32Service Service Control Message Accepted Bitmasks
Predefined Constants
PHP Manual