Pls help: Sending Lotus Notes mail from delphi

I'm trying to send mail via Lotus Notes from Delphi. i am able to send
the mails successfully by importing the type library, domobj.tlb. but
i want to include more features such as to set the importance of the
message so that there will an exclaimation mark in the inbox.

Also, i wanted to add an entry to the Lotus' To Do List from delphi.
is It possible to do it?

any help would be greatly appreciated.