I know the mess.be forums know alot about add-on programming, they were talking about this thing the other week I think. Just a heads up you may or may not know Messenger Plus! is changing and soon plugins will be replaced by scripts. Scripts will contains new and exciting functions for messenger, but you need a jscript knowledge to use them. However, you can still use Delphi, as you can make some functions all from a .dll using the scripts