So you want to be a DelftShell developer?
Welcome to the team, and here are a few pointers to get you started. We're using MS Studio 2008, and all our code is in Subversion. You need to have an account (ask ~donchyts) to get to the Sources.
Start by checking out the sources locally:
cd [Your Developement Root Dir] svn co https://repos.deltares.nl/repos/delft-tools/trunk/src/ DelftShell