About commands

HTML Help API

About commands

The HTML Help API supports a set of commands (uCommand values) that enable you to access functionality programmatically.

The most basic of the commands is HH_DISPLAY_TOPIC, which enables you to open a compiled help (.chm) file in a specific help window and display a specific topic within the help file.

Commands quick reference

Category Commands

Window types

Context-sensitive help

Keyword lookups

Navigation pane

Error messages

Contents synchronization

Single threading

link to overview topic About the HTML Help API