It's only got a COM api (with VBA included I think) for the vertical package, all else can be handled in your favourite language/s though.
I'm losing patience very quickly with it though, I can't even get a basic end plate connection happening without it dropping the ball and it doesn't seem to have any real parametric ability to suit member sizes from what I can see so far
The auto dim's are not as configurable as I'd like either, this is where nearly all of these verticals fall down (TSD is the only one I've used so far that details as you would 'by hand' that's the easiest to check).
These developers just can't get this part right (with the reason most likely being they don't detail or check for a living), it's pretty straight forward and common sense really and the drawings are cleaner to boot.
I wish I could produce a drawing Kerry so I could give the mat lists a go, they seem pretty comprehensive and configurable (so it seems at least).
I've been having a play with Tekla structures and even without any training I can produce a model and some details pretty quickly, with experience this would be a very powerful and very fast app! (The price tag hurts though...approx. $38k for Aussies a seat!!).
Dimension output is very configurable and the details are 'live' linked to the model and don't mess up your changes or extra dim's and symbols on updates.
We are also going to investigate Graitec Advance Steel (apparently written by an ex Tekla guy) which doesn't look too bad, I'll keep you posted.