hey guys a got an idea for a small script. when you block some contacts they are stored in a 'Blocked' group in your contactlist. when you unblock them they go back to the group they came from.
The Messenger API lets you do a lot of things relating to messenger. You can check what group contacts are in, create groups, add contacts to groups, and a lot of other stuff in other aspects of messenger. It can be used in scripts, but for some reason a lot of it doesn't work in scripts. Therefore, you can create a DLL to use it and call DLL functions from the script.