Notes/Domino 6 and 7 Forum : C API reading/changing Rich Text

I'm new to the C API arena, but I need to figure out how to do the following using the C API: I have a rich text item (gotten via NSFItemInfo), and now I want to identify any/all file attachments and replace them with a text message at the point in the rich text where the file attachment was added.

I was thinking of using NSFNoteExtractWithCallback, that would get me a callback for each $FILE in the note, but from what I read, it doesn't give you anything into the rich text field where I need to place my message.

I am now looking at EnumCompositeBuffer, which provides a callback for each CDRecord of a RichText field. One question on this is whether the callback function will be called in the order the CDRecords appear in the RichText Field? Can I depend on that order?

If Not, is there some other way to link the File attachments to their position in the RichText files?

I need to place my message where the File attachment icon is, not appended to the end of the field.

Using EnumCompositeBuffer, I'm assuming that I should key on SIG_CD_FILEHEADER and subsequent FILESEGMENT records. Is that rigth?

Any guidance would be greatly appreciated.