I haven't tested it, but with regular TMemos, TRichedit you can scroll
the caret by sending a message like:

ibMemo.SelStart := 0;
ibMemo.SelLength := 0;
// now send a message to scroll the first line in view ...
SendMessage ( ibMemo.Handle, EM_SCROLLCARET, 0, 0 );

Let me know if this works for you.

Regards

Luc.