As stated, I've just started working with the Revit API and I've been unable to find a way to do a few things that I'd like to do. If any of these can be done, I could use some direction as to how they're done.
1) Can I create Design Options? Can I add an element to an existing Design Option?
2) Can I create or load a new system family types like WallType or RoofType?
3) Can I set the active document?
Thanks in advance for any assistance.