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The construction of a message box is as follows.
If an application form skin is not in use and no message box translated captions are available (or the current locale is English), the standard Windows message box is displayed.
If an application form skin is in use or message box translated captions are available, a custom message box is displayed. If no message box translated captions are available and the locale is not English, the button captions from the resources in the Windows user32.dll are used. This means the captions will be displayed using the language that is currently installed on the user’s workstation. If a button translation is available, the text of the translation is used. The custom message box is built so that its size does not exceed the displayable screen area. If the text displayed exceeds the displayable area, a vertical scroll bar is displayed so that the entire message can be accessed.