1. Introduction to Visual Basic and the VB IDE

2. Motivation
We'd like to be able to write programs that will run on Windows
We'd like to use Rapid Application Development methods
We’re interested in developing object-oriented, event-driven applications
• MyAge, YourGrade, and ThisTest
were declared on the previous slides -
must be declared first to use them

3. Basic 10 sum = 0 20 FOR i = 1 to 100 30 sum = sum + i 40 NEXT i
50 avg = sum / 100
60 PRINT "The average is " avg
70 END

4. RAD Rapid Application Development Easily develop interface prototypes
Accelerates delivery of system
Better user feedback and testing
WYSISYG development

5. Object-oriented Programming
Think in real-world concepts
Objects have
Properties/attributes (nouns)
Actions/events (verbs)
Akin to a "record" on steroids! 
Groups data and procedural abstraction together
Provides for encapsulation & information hiding

6. Event-Driven Programming
Basic and Pseudocode run from top to bottom
Main program/algorithm in control
Event-driven programs respond to events
Usually graphical (forms, buttons, controls)
Instructions are executed in response to events
Button press, control change, form close, etc.

7. Anatomy of a VB Program User clicks on the cmdBorder button
Form
Controls
User clicks on the cmdBorder button
A Click() event is generated
The cmdBorder_Click() method is executed

8. Event-driven vs. Procedural
algorithm CalcAges
// create the 4 age variables
Age1, Age2, Age3, Age4 isoftype Num
// prompt the user and then read in the
// numbers
print("Please enter 4 ages")
read(Age1, Age2, Age3, Age4)
// I need a place to store the average
avg isoftype Num
// calc the average
avg <- (Age1 + Age2 + Age3 + Age4) / 4
// display it back to the user
print("The average age is ", avg)
endalgorithm

9. VB Program Development
Design
Create the User Interface (UI)
Set form and control properties
Code event handlers
Save and test/debug your program often!
Create executable file
Create setup program (for deployment on other computers)

10. The VB IDE

11. Design vs. Run Time Design time When you’re building your program
Some properties may not be set
Run time
When you run your program
Events are generated from user (buttons, etc.)
Opens up more properties of controls

12. Versions Visual Basic has evolved and will continue to evolve
We will be using VB.Net

13. File Types VBP Visual Basic Project (meta file)
VBW Visual Basic Workspace (settings of project)
FRM Form (form, control, methods, & attributes)
EXE Self-contained executable program
SCC Visual SourceSafe file (for versioning/collaboration)
others to be announced as needed

14. MSDN Microsoft Developers Network Your lifeline
Your best friend when programming
On-line or on CD-Rom
Mouse over “Libraries” and click “MSDN Libraries”
Live it; Love it; Use it!

15. Summary VB is based on Basic VB is a RAD language
VB is an event-driven language
VB is an object-oriented language
VB comes in different versions and editions
Important terms to know/understand:
Form, control, method, event, attribute/property
IDE, RAD, OOP