THPDFPage.SetPageAdditionalAction Method

Installs a page open or page close action from a THPDFActionBuilder under the current page /AA dictionary

Declaration

procedure SetPageAdditionalAction(Trigger: THPDFPageActionTrigger; Action: THPDFActionBuilder);

HPDFDoc

Name	Purpose
`Trigger`	Page additional-action trigger, either `patOpen` or `patClose`
`Action`	Action chain built with `THPDFActionBuilder`

The method replaces any existing action for the same page trigger and keeps the other trigger intact
THPDFActionBuilder.ThenAction chains are preserved under the emitted /Next entry
Builder validation enforces PDF/A and PDF/X restrictions for JavaScript, SubmitForm, Launch, and other restricted action types