This is my first try ever to do an API so bear with me if I'm not doing it right.

Im highly open to suggestions and fixing bugs related to the new API.
The API as it is now, is probably not gonna be how the final v1 of the API is gonna be, so don't except your plugins to work when 1.8 is released (although they probably will).
Docs for the API's can be found at
http://www.adiirc.com/docs/ .. (click on classes).
You will notice there are no GUI API's yet, this is not possible atm, but will come at some point, you can however do you own dialogs and stuff like that.
If you want to play with this, but don't know what to do, you can download a sample plugin in Visual Studio C# Express format at
http://www.adiirc.com/plugins/MyPlugin.zipYou can download Visual Studio Express at
http://www.microsoft.com/express/download/Any version will do, I just prefer c#

You will also need to get the latest beta version (which can be buggy)
http://www.adiirc.com/AdiIRC.zipThe
http://www.adiirc.com/AdiIRCAPI.dll is included in both this zip file and the myplugin project.
Plugins needs to be in Plugins/* in the adiirc folder, and they will be auto loaded. There is a plugin manager, but it's not done yet, File -> Plugins.
Look forward to see some creative plugins, and please ask if you have any problems.