Best way to communicate between forms?

Question

I almost never used (advanced, or at all) graphical interfaces, or one simple form with simple controls... but this time I\'ve got something a little more complex, and I don

Answer 1

The most flexible, scalable (and IMHO the most professional) way to do it is to use CAB (Composite Application Block). In simple terms CAB is a set of 2-3 assemblies that implement a lot of plumbing required to make complex UI applications the right way and it exposes this plumbing to the user of the library in a nice way. Among others it has a very nice event and command (as in command pattern) system.

The downside: requires some time to learn and not very trivial to grasp.

Here is a comprehensive (but easy to understand) tutorial that will help you make the learning easier.