I believe the following properties could help you.
ComponentOccurrence.Suppressed property returns whether this occurrence is suppressed or not.
ComponentOccurrences.AllLeafOccurrences property returns all unique leaf occurrences (optionally filtered to the specified definition) relative to this context.
ComponentOccurrences.AllReferencedOccurrences property returns all occurrences that reference the input object.
Document.ReferencedDocuments property returns all the documents directly referenced by this document.
Document.AllReferencedDocuments property returns all the document references of this Document along with all of the recursively nested references.
Vladimir Ananyev
Developer Technical Services
Autodesk Developer Network