[WriteLog] WL rig interface Question

[Curt Nixon]

What standard rig interface, if any, is used for WriteLog?  ie the 
module that provides the DDE to C-IV etc.
This would be the similar function that Hamlib provides for Linux apps.

I'm working on a hardware development project and would like to be 
certain I can make it work with WL.

Or..alternatively, is there a command and interface protocol document 
somewhere that describes the current rig apps or how to add a new one?

Thanks,

Curt
KU8L