string ( get-text-from-user string message optional string default-value optional long centre-message)
Give a message string and a default value, pops up a dialog box prompting the user to enter a string. Returns the input string if the user pressed Ok, or the null string if the user pressed Cancel.
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.