MessageBox

It displays a message window, which presents a message to the user. It is a modal window, blocking other actions in the application until the user closes it. Also the application can make a decision based on the user response. Title, message, buttons, and icons can be displayed in the message box and parameters are passed to this method.

This feature is used as a notification system. The reminders which have an alarm system, will notify the user when it’s happening.