Caution: NT service applications are logical extensions of Windows NT. As such, they can adversely affect the stability of your system. A VisualAge NT service application should be well tested outside of the NT Service environment before installing it as an NT service. You can find extensive information on developing and running NT services in the Microsoft Windows NT Workstation/Server Resource Kit or in the Microsoft Developers Network (MSDN) documentation.
You can turn your application into a Windows NT service. An NT service application is a headless application that conforms to the interface rules of the Windows NT Service Control Manager (SCM). A service application can be started automatically by the system when it is booted, manually by a user through the Services control panel, or by another application such as the Service Controller (sc.exe) shipped with the Windows NT Workstation/Server Version 4.0 Resource Kit. A service application can run without reference to a logged-on user.