If you want to used a ThemedTooStrip, that is easy as well. You have to put the controlling logic in yourself, but it is about as easy as it gets. I've included a sample that shows how to do it.In short, it has a ThemedToolStrip with 3 buttons, a PanelManager with 3 pages, and some random controls on each page so you can tell when it switches. When you click button1, you uncheck button 2 and 3, and tell the PanelManager to set the active page to Page1. Likewise, when you click button 2 or 3, you uncheck the other buttons, and set the active panel manager page appropriately.
You can see from this sample that you can turn anything into a tab control using a panel manager and a small amount of code.