Parameters: MessageText, DialogTitle, Buttons

Show a message with the specified MessageText and the DialogTitle heading:

The Buttons parameter determines what buttons and appearance the Message Box should have. Possible variants:

• Ok
• Ok, Cancel
• Yes, No, Cancel
• Abort, Retry, Ignore
• Exclamation
• Critical
• Critical + Ok, Cancel
• Critical + Yes, No, Cancel
• Critical + Abort, Retry, Ignore

RETURN VALUE: Name of the pressed button, that is, one of values: ok, cancel, yes, no, abort, retry, ignore.