Visual F# Windows form closing after showing - winforms

Question

Good Day,
I have just started learning visual F#, and it looks surprisingly fun to do. For my first project I got my hands dirty by immediately make a windows form to download info from a page and display it in a RichTextBox on the form. Problem is, once the form shows and information is downloaded, it immediately closes. How do I keep my masterpiece open for viewing? Any advice?
I have 2 Files currently:
Program.fs
Script1.fs
Program.fs is supposed to "create" the form, where Script1.fs is merely the entrypoint for the application.
Program.fs
namespace Program1
open System.Windows.Forms
module public HelloWorld =
let form = new Form(Visible = true, TopMost = true, Text = "Welcome to F#")
let textB = new RichTextBox(Dock = DockStyle.Fill, Text = "Initial Text")
form.Controls.Add textB
open System.IO
open System.Net
/// Get the contents of the URL via a web request
let http (url: string) =
let req = System.Net.WebRequest.Create(url)
let resp = req.GetResponse()
let stream = resp.GetResponseStream()
let reader = new StreamReader(stream)
let html = reader.ReadToEnd()
resp.Close()
html
textB.Text <- http "http://www.google.com"
Script1.fs
open Program1
[<EntryPoint>]
let main argv=
printfn "Running F# App"
HelloWorld.form.Show();
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I need to reiterate, I started with F#. This is my first application I wrote. How do I keep the form open?

Answer 1

You need to call Application.Run and pass your form object into it. http://msdn.microsoft.com/en-us/library/system.windows.forms.application.run(v=vs.110).aspx
This will create a message loop, and keep your application alive until the form is closed.
open Program1
[<EntryPoint>]
let main argv=
printfn "Running F# App"
System.Windows.Forms.Application.Run(HelloWorld.form)
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