MMC Property Sheets
When a user right-clicks a scope node or a result pane item and then clicks Properties, MMC allows the primary snap-in to add property pages to it. MMC then gives any extension snap-ins the same opportunity. If any snap-ins add property pages, MMC displays a property sheet with each property page as a tab on the property sheet. Any user action made on a particular property page is forwarded to the snap-in that added that page.
A stand-alone snap-in can also display a property page independent of the Properties command. In this case, the snap-in that requests the property sheet must explicitly tell MMC to allow extension snap-ins to add their own property pages.
There are several options regarding how to implement snap-in Help on property sheets. For more information, see Adding HTML Help Support.