passing information...

This is probably basic, but I sure could use some assistance. The situation: I have a form and one additional class in my project. The form will contain the following elements: - button "Start" - button "Stop" - button "One" - button "Two" - button "Three" - listBox The other class (called Methods.cs) will contain various methods which do very basic tasks. These tasks will include ... - enabling and disabling the buttons on the form - adding information to my list box Questions: 1. Do I need to instantiate a new instance of the form within each method in the Methods.cs class? 2. If I do need to do this, is there a way to do it one time globaly so I don't have to add the code to each method? My only goal is to understand how to modify information / items / etc on a form, based on methods ran in a totally different class. Both are within the same namespace / same application. Any assistance woudl be appreciated.