When our app is running in Windowed mode, if a user minimizes and then restores the software it is not resizing properly. It is acting like the screen is Maximized the way it makes everything too large. What is the best way to fix this?

I would like to make sure I am handling everything properly from the first time it loads, to Maximizeing, Minimizeing, Restores... I don't know why this is so hard, but I just can't get it right.