Ok, turns out this is a pretty stupid question though I sure had a hard time finding it. Now that I've figured it out I'll answer my own question for the benefit of any future newbies.
The answer is:
1) On the top of the source code editor there is a series of tabs. I have one for my source file, one labeled Start Page, and one labeled with my Project Name. Click on the tab with the 'Project Name' on it.
2) Click on 'Debug' in the list on the left (Application, Build, Build Events, Debug, ...)
3) On the 'Debug' page you can specify command line options.