developer-delphi-windows-services

Delphi Windows Service development uses TService to handle service lifecycles by wiring OnStart, OnStop, and OnExecute events. You implement a controlled worker thread for background processing, ensuring robust startup, shutdown, and continuous operation without user interaction.

Session 0 isolation affects Delphi Windows Services by separating services from user sessions, preventing direct UI interaction. Services must use Inter-Process Communication like Named Pipes to exchange data with user applications, ensuring secure background processing and strict process boundary enforcement.

The best way to implement IPC for a Delphi Windows Service is using Named Pipes. Named Pipes provide a robust communication channel between the Session 0 isolated service and user-level applications, enabling secure data exchange and status reporting across session boundaries.

You install and test a Delphi Windows Service using sc.exe by creating the service executable and running sc.exe commands to register it with the Service Control Manager. This allows you to validate deployment steps, test installation, and verify startup and shutdown behavior.

A Delphi Windows Service needs an event logger to report status and capture errors during background processing. Since services run without a user interface in Session 0, the event logger provides essential monitoring, tracks operational health, and diagnoses runtime issues.

You can debug a Delphi Windows Service by attaching to the process or implementing application mode logic. The guide covers debugging patterns to test TService behaviors, verify worker threads, and validate Session 0 IPC and event logging before full deployment.