#眉標=F#程式設計
#副標=F#程式設計入門（1）
#大標=走進Functional Programming的世界
#作者=文／蔡學鏞



==<反灰>===========
let x = "Hello World";;
System.Console.WriteLine(x);; 
==<end>==============





==<反灰>===========
C:\>fsc hello.fs
==<end>==============





==<反灰>===========
C:\>Hello.exe
Hello World
==<end>==============





==<反灰>===========
> let x = "Hello World";;
val x = string
> System.Console.WriteLine(x);; 
Hello World
val it : unit = ()
==<end>==============




==<反灰>===========
#light
open System
open System.Windows.Forms

let form = new Form()
form.Width  <- 400
form.Height <- 300
form.Visible <- true 
form.Text <- "Hello World Form"

// Menu bar, menus 
let mMain = form.Menu <- new MainMenu()
let mFile = form.Menu.MenuItems.Add("&File")
let miQuit  = new MenuItem("&Quit")
mFile.MenuItems.Add(miQuit)

// RichTextView 
let textB = new RichTextBox()
textB.Dock <- DockStyle.Fill  
textB.Text <- "Hello World\n\nOK."
form.Controls.Add(textB)    

// callbacks 
miQuit.Click.Add(fun _ -> form.Close())

#if COMPILED
// Run the main code. The attribute marks the startup application thread as "Single 
// Thread Apartment" mode, which is necessary for GUI applications. 
[<STAThread>]    
do Application.Run(form)
#endif
==<end>==============