Adding HTML Help Support: Implementation Details
To add HTML Help support
Implement the ISnapinHelp2 interface. Be aware that the snap-in's primary object, the one registered with the snap-in class ID (CLSID), should expose this interface.
In the snap-in implementation of the GetHelpTopic method, specify the address of the null-terminated Unicode string that contains the path of the compiled Help file (.chm) for the snap-in.
Be aware that for MMC to merge a snap-in's HTML Help file into the HTML Help collection file for the current console, the Help file must be compiled with the Create a binary TOC check box selected. This creates a binary contents file for the Help file.
If the snap-in HTML Help file links to other Help files, implement the ISnapinHelp2::GetLinkedTopics method to specify the names and locations of these files.
Handle the MMCN_CONTEXTHELP notification, which is sent when the user requests Help about a selected item by pressing the F1 key or clicking the Help button. In the notification handler for MMCN_CONTEXTHELP, call the IDisplayHelp::ShowTopic method to display the Help topic for the particular context. For property page Help topics, call MMCPropertyHelp.
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