Hi Zhen --
String to text field:
(define a-msg (make-message "Hello"))
(draw-message a-msg "Here is a text message")
draw-message writes a string message (2nd argument) to the gui-item it
accepts as the first argument
If the message were a symbol, you can covert it to a string using the
symbol->string function
(draw-message a-msg (symbol->string 'converted-symbol))
Likewise with a number
(draw-message a-msg (number->string 42))
FYI -- ignore exercise 35.4.2 per MF. The 'connect function is not
available.
Dave Yrueta