How do I create a closing window event?

You may also try to click on the form, press f4 to load the properties window, click on the bolt button and you'll see all the possible events that can be created for you, choose Closing and beside that type in whatever you want to call that event(e.g. Form1_Closing) and then write the codes you want to add between that method. :)

Thank-you for your help. I was eventually able to apply the info you gave me.

The event I want is the closing window event. I cannot select it. When I double click on it, I go to the form_load method. I guess I am missing something.

The list of events in C# is in the Properties window. First select the control you want for the event list. Then click on the lightning bolt icon in the Properties window.