Concept: Exiting a Windows application is done with the close button.Explanation:The close button is the button usually at the top-right corner of a window, marked with an ×. Clicking it exits or closes the application.The maximize button enlarges the window, the minimize button hides it to the taskbar, and the restore button returns it to a previous size.Therefore, the correct command button for exiting an application is the close button.Answer: close button