Vb.net hello World building first program

Before we study basic building blocks of the VB.Net programming language, let us look a bare minimum VB.Net program structure so that we can take it as a reference in upcoming Posts.
VB.Net Hello World Example

A VB.Net program basically consists of the following parts:

Namespace declaration

A class or module

One or more procedures

Variables

The Main procedure

Statements & Expressions

Comments

Let us look at a simple code that would
print the words "Hello World":

Imports System
  Module Module1
   'This program will display Hello World
   Sub Main()
      Console . WriteLine ("Hello World" )
      Console . ReadKey()
    End Sub
    End Module

When the above code is compiled and executed, it produces the following
result:

Hello, World!

Let us look various parts of the above
program:

The first line of the program Imports System is used to include the System namespace in the program.

The next line has a Module declaration, the module Module1 .

VB.Net is completely object oriented,
so every program must contain a module of a class that contains the data and procedures that your program uses.

Classes or Modules generally would contain more than one procedure.

Procedures contain the executable code, or in other words, they define the behavior of the class.

A procedure could be any of the
following:

Function

Sub

Operator

Get

Set

AddHandler

RemoveHandler

RaiseEvent

The next line( 'This program) will be
ignored by the compiler and it has
been put to add additional comments
in the program.

The next line defines the Main procedure, which is the entry point for all VB.Net programs. The Main procedure states what the module or class will do when executed.

The Main procedure specifies its behavior with the statement Console.

WriteLine("Hello World")
WriteLine is a method of the Console
class defined in the System namespace. This statement causes
the message "Hello, World!" to be displayed on the screen.

The last line Console.ReadKey() is for the VS.NET Users. This will prevent the screen from running and closing quickly when the program is launched from Visual Studio .NET. Compile & Execute VB.Net Program .

If you are using Visual Studio.Net IDE, take the following steps:
Start Visual Studio. On the menu bar, choose File, New, Project.
Choose Visual Basic from templates
Choose Console Application.
Specify a name and location for
your project using the Browse
button, and then choose the OK
button.

The new project appears in Solution
Explorer.
Write code in the Code Editor.
Click the Run button or the F5 key
to run the project. A Command
Prompt window appears that
contains the line Hello World.

You can compile a VB.Net program by using the command line instead of the Visual Studio IDE:

Open a text editor and add the above mentioned code.

Save the file as helloworld.vb

Open the command prompt tool and
go to the directory where you saved
the file.

Type vbc helloworld.vb and press
enter to compile your code.

If there are no errors in your code
the command prompt will take you to the next line and would generate helloworld.exe executable file.

Next, type helloworld to execute your
program.

You will be able to see "Hello World"
printed on the screen.