D: How would one make a shared dynamically linked D library?

[BoQsc via Digitalmars-d-learn]

I would like to export some functionality as external shared 
dynamically linked D library.

Is it possible to do that in D Language and what are limitations?
A simple `writeln` example would be great.

What I expect is an executable that uses functions, variables, 
classes, modules from compiled external shared D dynamic library.

Example of shared dynamic libraries depending on other shared 
dynamic libraries would be great as well.