You work as a Windows Application Developer for ABC Inc.

You work as a Windows Application Developer for ABC Inc. The company uses Visual Studio .NET as its application development platform. You create a Windows application using .NET Framework 2.0. The application provides accessibility features. The forms in the application display a background image. You want to remove the image whenever a user selects Use High Contrast in the Accessibility Options in Control Panel. You are required to add an event to handle this accessibility setting change. Which of the following events will you use to accomplish this task?