Creating a process and toggling its visibility?

Question

Hi.  I want to be able to launch a process, say Notepad, and have it visible.  I want to then be able to hit a button on my C# form and have the process toggle visibility.  I have a program that runs in a DOS window and I don't like having it on my taskbar all the time, which is the inspiration for my app.  I could use something like TaskEverything, but I prefer to roll my own whenever possible. 

Is that possible?  Thanks!