1. Visual Basic Project Development Environment
Introduction
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Prepared By: Deborah Becker

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Introduction
A brief Basic history.
What is an event-driven language?
Visual Basic’s unique concepts.
Basic stands for Beginner’s all-purpose symbolic instructional code. It was designed as a text based language. It did not resemble the graphical language most of us have grown accustom to. When Microsoft made the decision to use Basic as their primary language, and supply it with their DOS environment, they went through several incarnation of BASIC. First came MSBASIC, then GWBASIC (Gee Whiz BASIC), BASICA, QuickBASIC, and Qbasic (still included in the windows operating system disks). Through all these evolutionary changes Microsoft kept the basic structure adding new and more powerful commands and functions. They also kept the interpreted structure of the language as apposed to converting to a compiled language.
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Lecture Topics
The process of visual program design
Objects, Properties, and Methods
The three step method (which will be used)
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Process of Design
Using VB to produce program applications that run in the windows environment.
Event-driven.
Cycle.
Cycle
Output
Event-Driven
When a VB program runs
1. What the user sees is a form and its controls
2. When the user clicks on a control with the mouse,
types data into a text box, or presses the tab key the program changes
3. Each of these actions is called an event. Event-Driven – means that the user decides which control or object presented on the screen to activate. This is done by pointing to a control button, menu item, or input object with the mouse or using the tab key to advance from object to object on the form. Each time the user selects an object we call that an event. The basic code associated with that object will be activated at this time and will remain active until another object or control button is activated.
The programming cycle includes InputProcessingoutput
Input
Process
Test
Debug
Analyze
Design
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Programming cycle
1. The cycle begins with the output
2. The next step consists of identifying the data needed to produce the output
3. Last step, determine how to process the input to achieve the output desired
11/9/2018
Prepared By: Deborah Becker

6. Vocabulary (good test items)
Objects—things or nouns
Forms & Controls
Properties—tell something about the object
Color, size, location, behavior
Form1.Caption
Form1.Width
Methods—actions associated with objects
Print, Move, Resize, and Clear
Form1.Print (sends output to Form1)
Printer.Print (sends output to the printer)
Objects
1. Forms– are the windows and dialog boxes
2. Controls– are elements that are placed inside the form
Text boxes, command buttons, and list boxes
Properties
1. Property references include the name of the object, a period, and the property
Methods
1. They are the verbs of the OO language
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Prepared By: Deborah Becker

7. The Three Step Planning Process
Design the user interface
Plan the properties
Plan the basic code
1. Design the user interface
--Decide what your application is going to do by creating an over all design.
--Create the visual portion of your application (the screens and menus that you intend to incorporate into the project.
2. Plan the properties
--After you have designed your screens and menu, fill out a property sheet for each of the object and controls on you screens and menus.
3. Plan the basic code
--During the planning phase you will develop flow charts, Pseudocode, and Hierarchy charts.
11/9/2018
Prepared By: Deborah Becker

8. The Three Steps Programming
Construct the user interface
Set the properties
Write (add) the basic code (from your Pseudocode)
All these plans become your documentation after the project is completed. The more documentation and detailed the planning steps are, the less time you will spend coding your project. If your fail to plan you plan to fail. Any project turn into me without documentation will be give a maximum of 50%.
Programming examples
1. Define the user interface
2. Set the properties
3. Write the basic code
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Prepared By: Deborah Becker

9. Forms for program design are located on the Webct website.
Use these forms during your planning stage.
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10. The Visual Basic Working Environment
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Topics
The parts of the Visual Basic environment
How to place controls on a form
How to save your project and its files
The Property window’s features
Accessing the code window
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The New project window
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The New Project Window
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The Toolbar
Visual Basic has four toolbars
Debug
Edit
Form Editor
Standard
Debug – this toolbar is used during interactive debugging to trace and correct problems
Edit – is used to edit your visual basic code
Form editor – is used to adjust objects on your forms
Standard – this is the default tool bar that appears beneath the menu bar when you start visual basic 6.
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The toolbox
Pointer
Picture box
Text box
Label
Frame button
Check box
Option button
Horizontal and vertical
Scroll bars
Image box
Data Control
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The Form Window
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Project Window
Projects
Forms
Modules
Class Modules
User Controls
User Documents
Property Pages
Projects – An application may consist of several projects. Multiple project files will be created when you create ActiveX Controls. Project files always have the filename extension (.VBP)
Forms – The project window always contains a list or your forms. Form files always have the extension (.FRM)
Modules – Your project’s modules hold general and reusable routines of Visual Basic programming statements. You can use the same module in several programs due to its general nature. Modules always have the file extension (.BAS).
Class Modules – Class modules are special code modules that define objects you’ve designed for a project. Class module files always have the extension (.CLS)
User Controls – User controls are ActiveX controls that you have added to the project. ActiveX files always have the extension (.OCX).
User Documents – User documents are document
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The Property Window
Each property has a name and a value
Default names are assigned as you add controls
Command1
Always Rename
Always rename controls after you have placed the in the form window.
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Naming Conventions
Objects Prefix Example
Form
frm ...
frmDataEntry
Command Button 
cmd ...
cmdCalculate
Label
lbl ...
lblTotalDue
Text Box
txt ...
txtLastName
Option Button
opt …
optPaid
Check Box 
chk …
chkJuniorLevel
Frame
fra …
fraCustomerData
Horizontal Scroll
hsb …
hsbPrice
Vertical Scroll 
vsb …
vsbDiscount
Image
img …
imgEmployee
Picture Box
pic …
picOutput
Combo Box
cbo …
cboBeverage
List Box
lst …
lstSalad
Shape 
shp …
shpLayout
Look at the handout on naming conventions. These conventions are standards set by Microsoft and the Industry. The perform two valuable functions for your. The help you to read your code more easily. You can identify objects with in the code by the prefixes. By using the standards set by the industry you will find that it is easier to modify your code or someone else's.
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Getting Help
Visual Basic Help
Assistants and Wizards
Search
HTML pages
Index
ON-line
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21. Placing Controls on a Form
From the toolbox
Click the control you desire
Crosshairs
Double-Click
Default
Center of form
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Writing The code
Double click
On an object
Click View on
The toolbar
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Types of VB Statements
Remark statements
‘Gives additional information to clarify the project
Assignment statements
[let] Object.Property = value
End statement
End
Halts the program
Remarks are internal documentation for your program. They help you to identify what each module was designed to do. They help make programs easier to maintain.
Assign statements or let statements are used to assign value to objects and variables.
Other syntax statements include End. Each program your write for this class must contain an end statement that exit the program.
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Sample Code
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25. Errors, Errors Mi Kingdumb 4 Ann Error
Complier errors (syntax)
Run-time errors (naming errors, etc)
Logic errors (incorrect placement of instructions)
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Prepared By: Deborah Becker

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Summary
About Visual Basic
Project Planning and Design
Walked through the Components of the VB environment
Assignment
Read chapter two
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Prepared By: Deborah Becker

27. Where to Get More Information
Our Web-Page
Come to class
Read your book, web electronic sources
11/9/2018
Prepared By: Deborah Becker