MessageBoxShowDo

MessageBoxShowDo is a function used in certain graphical user interface toolkits to display a modal message box to the user. It presents a short message and an optional title, along with a set of buttons that the user can press to respond. The function returns an indication of which option the user selected.

The exact API varies by framework, but typical parameters include the message text, a caption or title, the set of buttons (such as Yes/No, OK/Cancel, or a custom button collection), and optionally an icon and a default button. Some implementations may also support features such as a timeout, localization, or custom button labels.

Return values are usually conveyed through an enumeration or constant that identifies the pressed button. In asynchronous environments, the function may offer a callback or a task/promise that resolves with the user’s choice. While some versions provide synchronous, blocking behavior, others are designed to be non-blocking and integrated with the event loop of the application.

Usage notes: the dialog is typically modal, blocking interaction with other windows until it is closed. It is commonly employed to confirm potentially destructive actions, alert users to conditions, or solicit a simple decision. Developers should invoke it on the UI thread and consider accessibility and localization when defining button labels and messages.

See also: MessageBox.Show, ShowDialog, dialog or alert APIs in various UI toolkits.