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MessageBox Control

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Paul Mansour edited this page Aug 13, 2021 · 2 revisions

The MessageBox control is a form control that displays a simple message and one or more buttons. It returns an integer indicating the selected button.

The default behavior is to display a single button labeled OK:

      r←MessageBox.Run 'File saved.'

The number and caption of the buttons may be specified:

      r←MessageBox.Run 'Do you want to save your changes?'  ('Yes' 'No' 'Cancel)

The result r is the zero-origin index of the button selected, or -1 if the message box is dismissed by pressing Esc or clicking on the x.

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