Use this function to load native data from an embedded item.
virtual BOOL OnPasteNativeObject(
Nonzero if successful; otherwise, 0;
Typically, you would do this by creating a COleStreamFile around the IStorage. The COleStreamFile can be attached to an archive and CObject::Serialize called to load the data.
This is an advanced overridable.
For more information, see IStorage in the Windows SDK.