21 lines
No EOL
605 B
Racket
Executable file
21 lines
No EOL
605 B
Racket
Executable file
#lang racket/gui
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(require racket/gui/base)
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; Make a frame by instantiating the frame% class
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(define frame (new frame% [label "Example"]))
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; Make a static text message in the frame
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(define msg (new message% [parent frame]
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[label "No events so far..."]))
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; Make a button in the frame
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(new button% [parent frame]
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[label "Click Me"]
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; Callback procedure for a button click:
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[callback (lambda (button event)
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(send msg set-label "Button click"))])
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; Show the frame by calling its show method
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(send frame show #t) |