Adding New Tasks
The adding new tasks screen creates a new task, and notifies the main form that a new task is created. It does this through an event; the information for the new item is passed to an event argument, an event is fired, and the new object is created in the main form, as the main form subscribes to this event. As I said earlier, the main form handles the adding/removing of tasks in the list, so this works out nicely.
Some features are only available for reoccuring tasks, and as such, are only visible upon selecting it. This is handled in the form as well.
Attached is the interface for this method.