word ( message-box string message optional word type optional long centre-message)
Pops up a dialog box with a message, where the buttons on the dialog box depend on the type parameter. This may be OK, OK-CANCEL, YES-NO or YES-NO-CANCEL. The return value is OK, CANCEL, YES or NO.
If centre-message is 1 (the default), the message will be centred on the dialog box. If it is 0, the message will be left-justified. New lines are allowed in the message.