Initial data commit

Task/Hello-world-Graphical/Racket/hello-world-graphical.rkt

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+ #lang racket/gui
+(require racket/gui/base)
+
+; Make a frame by instantiating the frame% class
+(define frame (new frame% [label "Goodbye, World!"]))
+
+; Make a static text message in the frame
+(define msg (new message% [parent frame]
+                          [label "No events so far..."]))
+
+; Make a button in the frame
+(new button% [parent frame]
+             [label "Click Me"]
+             ; Callback procedure for a button click:
+             (callback (lambda (button event)
+                         (send msg set-label "Button click"))))
+
+; Show the frame by calling its show method
+(send frame show #t)