Computer History Notes - Herong's Tutorial Notes - v3.13, by Herong Yang
HelloCLR.vb - Sample Application in VB
This section provides a tutorial example on compiling a sample program written in VB (Visual Basic) and executing it on the CLR (Common Language Runtime) of the .NET Framework.
New let's try to compile a simple application written in VB (Visual Basic) into a bytecode, so it can be executed by the CLR (Common Language Runtime) of the .NET Framework.
1. Enter the following source code in Notepad and save it file called, HelloCLR.vb:
' HelloCLR.vb
Imports System
Public Module HelloCLR
Sub Main()
Console.WriteLine ("Hello VB CLR " _
& Environment.Version.ToString() & "!")
End Sub
End Module
2. Compile the source code stored in HelloCLR.vb using the .NET Framework 4 VB compiler in command window:
herong> \windows\Microsoft.NET\Framework\v4.0.30319\vbc HelloCLR.vb
Microsoft (R) Visual Basic Compiler version 10.0.30319.1
Copyright (c) Microsoft Corporation. All rights reserved.
herong> dir HelloCLR.*
225 HelloCLR.cs
6,656 HelloCLR.exe
234 HelloCLR.vb
The output of the "vbc" command is the bytecode of the program in Intermediate Language stored in file, HelloCLR.exe, in the PE (Portable Executable) format.
3. When HelloCLR.exe is entered from a command line, Windows will invoke .NET CLR (Command Language Runtime) to perform the execution step:
herong> HelloCLR.exe Hello VB CLR 4.0.30319.239!
The CLR version number returned in the output shows that the program is executed in the .NET CLR virtual machine.
Table of Contents
►2002 - .NET Framework Developed by Microsoft
Introduction of .NET Framework
HelloCLR.cs - Sample Application in C#
►HelloCLR.vb - Sample Application in VB
1995 - PHP: Hypertext Preprocessor Created by Rasmus Lerdorf
1995 - Java Language Developed by Sun Microsystems
1991 - WWW (World Wide Web) Developed by Tim Berners-Lee
1991 - Gopher Protocol Created by a University of Minnesota Team
1984 - X Window System Developed a MIT Team
1984 - Macintosh Developed by Apple Inc.
1983 - "Sendmail" Mail Transfer Agent Developed by Eric Allman
1979 - The Tcsh (TENEX C Shell) Developed by Ken Greer
1978 - Bash (Bourne-Again Shell) Developed by Brian Fox
1978 - The C Shell Developed by Bill Joy
1977 - The Bourne Shell Developed by Stephen Bourne
1977 - Apple II Designed by Steve Jobs and Steve Wozniak
1976 - vi Text Editor Developed by Bill Joy
1974 - Internet by Vinton Cerf
1972 - C Language Developed by Dennis Ritchie
1971 - FTP Protocol Created by Abhay Bhushan
1970 - UNIX Operating System Developed by AT&T Bell Labs