Allows you to define an alternative context ID for the topic. By default, the context ID is the Object Code of the topic. This context ID can be used when linking in to your help file. The Context ID field supports 50 numeric characters.
Note: Alias Name and Context String fields can contain both alpha and numeric characters, while the Context ID field can only contain numeric characters.
The HelpContextID element corresponds to the "Context ID" field, on the Linking sub-tab, on the Windows Help tab, of the Topic object.