// Open the Windows Forms library
open System.Windows.Forms
// Create a window and set a few properties
let form = new Form(Visible=true, TopMost=true, Text="Welcome to F#")
// Create a label to show some text in the form
let label =
let x = 3 + (4 * 5)
new Label(Text = sprintf "x = %d" x)
// Add the label to the form
form.Controls.Add(label)
// Finally, run the form
[<System.STAThread>]
Application.Run(form)