Visual basic

05/18/16Mr. Roger C. Argarin
1
Introduction to visual basic
programming

Lecture 1: Introduction
2
Introduction – Learning objectives of the class
Introduction to Visual Basic
 Brief History of Visual Basic
 Basic Concept of Visual Basic Programming Language
 Programming Environment
Use Microsoft Visual Studio .NET2005

Learning Objectives
3
Visual program design and development
Fundamentals of Object Oriented Programming
(OOP)
Event driven programming
Objects, properties and methods
Write Visual Basic projects

History of Visual Basic
4
The Visual Basic programming language was
developed by Alan Cooper, an American scientist
in the late 1980’
This programming language was created with the
main purpose of teaching programmers and
developers how to design graphical-user interface
(GUI) programs easily.

Overview of Programming
5
The Structure and Operation of a Computer
Computer system: hardware and software
Processor (registers, primitive operations)
Main memory (RAM, ROM)
Data types (integers, real, floating-point
numbers, strings, etc.)
Sequence and Data Control
Storage management
Operating environment

Overview of Programming (continue)
6
Computer System (PC)
Hardware Software
Processor,
Memory
Data types,
Sequence and
Data Control,
Storage Management,
Operating Environment

Major Components of Computer
Systems
7
Input Unit (keyboard, mouse, scanner, Internet
through TCP/IP)
Central Processing Unit (CPU)
Output Unit
Memory Unit
 Primary memory (RAM, ROM)
 Secondary memory (Hard drives, zip disks, floppy disks, etc)

Object Technology
8
Objects are essentially reusable software
components that model items in the real world, such
as windows cars, vehicles, and so on
Object technology is a packaging scheme that
enables programmers to create meaningful software
units.
Object-Oriented Programming tends to produce
software that is more understandable, better
organized, and easier to maintain, modify and
debug.

Object Model
9
 Object ==> Noun
 Form and Controls
 Property ==> Adjective
 Color of a Form
 Method ==> Verb
 Move a Form
 Event ==> Occurs when the user takes an action
 User clicks a button, User moves a form
 Class ==> Template to create new object
 Each control added is an Instance of a Class

Dot Notation
10
Used to reference object's properties and events in
code
 Object dot Property
 Form.Text, TextBox.Text
 Object dot Event
 Form.Hide( ), TextBox.Focus( )
To reference an object's events use an underscore
instead of a dot
 Button_Click, ListBox_TextChanged

Object Model Analogy
11
Class = automobile
Properties = make, model, color, year
Object = each individual car
 Object is also an Instance of the automobile class
Methods = start, stop, speedup, slowdown
Events = car arrives, car crashes

Visual Basic .NET Programming
12
Learning Visual Basic.NET Programming Language
includes to learn:
 The graphical user interface or GUI (“gooey”) which is an
essential component of visual programming
 The GUI defines how various elements look and function
 Visual Basic programming language
Microsoft Developers Network Homepage for VB.NET:
http://msdn.microsoft.com/vbasic

A Sample Graphical User Interface
(GUI)
13
Label
GroupBox
RadioButtons
TextBox
PictureBox
Buttons
Form

VB.NET Program Development
14
To create a VB.NET program you will utilize the
Visual Basic .NET 2005 development environment,
and you will
 create a window, called form
 select elements, which are classes, from a toolbox and place
them within the window, called controls
 write code for each object that you place on the window that
defines how the object responds to various events, called
object-oriented programming (OOP).

Event-Driven Programming
15
The style of Execution as shown below is called
event-driven:
 A GUI determines how a user interacts with the program
 Each user interaction with the computer: pressing a key,
clicking a button, or selecting a menu item causes an event to
occur
 Whenever an event occurs, the code you have written to
handle that event is executed

About Visual Studio .NET
Framework
16
Visual Studio .NET 2005 includes:
 Visual Basic, Visual C++, C#, J#, and the .NET framework.
 The .NET framework allowing objects from different
languages to operate together
 The .NET languages-based programs all compile to a
common machine language, called Microsoft Intermediate
Language (MSIL)
 The MSIL code runs in the Common Language Runtime
(CLR), which is part of the file .NET framework.

VB.NET Program Development
Process
17
Planning (design)
 design the GUI (user interface)
 list the objects and properties needed
 plan the event procedures (what the code does)
Programming (implementation)
 define the GUI using objects (Forms, Text Boxes, Labels, etc.
 set the properties
 write BASIC code to implement procedures

VB.NET Application Files
18
 Each Visual Basic application create the following
files with extensions:
 .sln - a solution file that holds information about the
project. This is the only file that is opened
 .suo - a solution user options file that stores
information about the selected options
 .vb - a .vb file that holds the definition of a form
 .resx - a resource file for the form
 .vbproj - a project file that describes the project and
lists the files are included
 .vbproj.user - a project user option file that holds
project option settings

Using Microsoft Visual Studio .NET
19
 Click on
-> Start
 Choose ->
All
Programs
 Choose ->
Microsoft
Visual
Studio
.NET 2005
 Click on
->
Microsoft
Visual
Studio
.NET 2005

(continue)
20
• Click
on->
File
• Choose
-> New
• Select-
>
Project

(continue)
21
The Microsoft VS Development Environment is also
called integrated development environment (IDE):
 A form designer
 A code editor
 A compiler
 A debugger
 An object browser

Using Microsoft Visual Studio .NET (continue)
22
 Menu bar – includes file, edit, view, project, build, debug, data, format, tools,
window, and help menu
 Toolbar - includes many buttons as shortcuts for frequently used operations.
Each button represents a command that can be selected from a menu. Most
toolbars’ buttons are displayed in the main window of the IDE
 Each window can be moved, resized,
opened, closed, or customized
 Menu bar
 Toolbar
Menu bar
Toolbar

23
Form
window
Properties window
Solution
Explorer
window
Menu bar
Tabs
Toolbox
Tool bar

The Toolbox
24
 Click
Toolbox
from the
Toolbar
s
 Toolbox
contains
a list of
tools
that
helps to
design
projects

Solution Explorer
25
 View Code
 View
Design/
Form
 Properties
welcome.slnwelcome.sln

The Property Window
26
•The properties window allows you to see and set all of the properties of the
particular object that you have placed on the form. There are many properties
for each object, and all can be seen by scrolling down the properties window.

Summary
27
Introduction – Learning Objectives of the class
Introduction to Visual Basic .NET2005
 Basic Concept of Visual Basic
 Visual Basic Programming Language
Use Microsoft Visual Studio .NET2005
Next - First Visual Basic Planning and Programming

Visual basic

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