The `MessageBox` widget is a widget for displaying message boxes. These can hold a title, a message/question and buttons for choosing alternatives. These are linked to python routines in the calling main program. These alternatives are given as a dictionary. The dictionary keys are the labels for the buttons while their values define the name of the routines to jump to. If the value is an empty string "" no action is taken when this option has been chosen. You can also define the size of the messagebox.