test.rkt
#lang racket/base

(require "loadlib.rkt" "main.rkt")
(provide gtk run)

(define gtk (gi-ffi "Gtk"  "2.0"))

(define (run)
  (gtk 'init 0 #f)
  (define win (gtk 'Window 'new (gtk 'WindowType ':toplevel)))
  (connect win "destroy" (λ (window) (gtk 'main-quit)))
  (define button (gtk 'Button 'new-with-label "Hello, world"))
  (connect button "clicked" (λ (button) 
                              (displayln (button 'get-label))))
  (button 'show)
  (win 'add button)
  (win 'show)
  (gtk 'main))