Object Linking and Embedding - Technical Details

Technical Details

OLE objects and containers are implemented on top of the Component Object Model; they are objects that can implement interfaces to export their functionality. Only the IOleObject interface is compulsory, but other interfaces may need to be implemented as well if the functionality exported by those interfaces is required.

To ease understanding of what follows, a bit of terminology has to be explained. The view status of an object is whether the object is transparent, opaque, or opaque with a solid background, and whether it supports drawing with a specified aspect. The site of an object is an object representing the location of the object in its container. A container supports a site object for every object contained.

What follows is a list of interfaces, grouped by the object that usually needs to implement them. Interfaces usually implemented by the OLE object are usually called on by the OLE container, and vice-versa. Note that in the following list indentation indicates interface inheritance. All non-indented interfaces derive from IUnknown.

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