use System.Windows.Forms use System.Drawing class HelloForm inherits Form cue init base.init .size = Size( 640, 480 ) .text = "Hello, World" label1 = Label() label1.size = Size( 320, 20 ) label1.text = "Hello, Windows Forms(Cobra) World!" .controls.add( label1 ) class Program def main is shared has STAThread form = HelloForm() Application.run( form )