HelpNDoc includes a scripting engine that allows users to automate repetitive tasks, customize templates, and manipulate project content programmatically. Scripts can be written using a built-in object pascal subset language and applied directly in templates, dynamic content library items, or in the script editor. 

See:

• Object pascal subset : A lightweight subset of Object Pascal for scripting and automation.
• HelpNDoc API methods : Methods to interact with projects, templates, and outputs programmatically.
• Using the Script Editor : A built-in tool for writing, debugging, and executing scripts.