Floggy, go download Visual C# 2008 Express Edition.
Make a new project and add references, Styx.dll , Styx.CustomCombat.CombatInterface.dll, Styx.Plugins.PluginClass.dll
from the latest HB version and you have your complete list over all the API calls.
Also, you can use them to create an empty CC with all the regions pre-defined ^^
I found it was easier to use VC# to code when it auto-fills statements and such, the dropdown list is a godsend when you wanna look up what commands you can use.