visualbasic lecture2.pdf

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Copyright 2011 Pearson Addison-Wesley

Addison Wesley

is an imprint of

2011 Pearson Addison-Wesley. All rights reserved.

Chapter 1

Introduction to

Programming and VisualBasic


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Addison Wesley

is an imprint of


Section 1.3

More about controls andprogramming

As a Visual Basic programmer, you must

design and create an applications !"I elements #$orms and

other controls% and the

ro rammin statements that res ond to


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Visual Basic Controls

As a (indo)s user youre already $amiliar

)ith many Visual Basic controls*

+abel displays te-t the user cannot change e-tBo- allo)s the user to enter te-t

Button / per$orms an action )hen clic0ed

adioButton A round button that is selected ordeselected )ith a mouse clic0

Chec0Bo- / A bo- that is chec0ed or unchec0ed

)ith a mouse clic0 Chapter 1 Slide 3


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utorial 13, Visual Basic

Controls

Chapter 1 Slide


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he 4ame Property

All controls ha'e properties

5ach property has a 'alue #or 'alues%

4ot all properties deal )ith appearance he name property establishes a means $or

the program to re$er to that control

Controls are assigned relati'ely meaninglessnames )hen created

Programmers usually change these names to

something more meaning$ul Chapter 1 Slide 6


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5-amples o$ 4ames

he +abel controls use the de$ault names

#+abel1, etc.%

e-t bo-es, buttons, and the !ross Pay labelplay an acti'e role in the program and ha'e

been changed

btnCal!rossPay btnClose

t"t#o$rsWor%ed

t"tPay&ate

lbl!rossPay

'abel1

'abel2

'abel(

)orm1

Chapter 1 Slide 7


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4aming Con'entions

Control names must start )ith a letter

emaining characters may be letters, digits, or

underscore 1st 3 lo)ercase letters indicate the type o$

control

t-t8 $or e-t Bo-es

lbl8 $or +abels

btn8 $or Buttons

A$ter that ca itali9e the $irst letter o$ eachChapter 1 Slide ;


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Addison Wesley

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Section 1.

he Programming Process

he programming process consists o$

se'eral steps, )hich include designing, creating, testing, and debugging

acti'ities.


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Step 1 o$


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Step ? o$


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Step 3 o$


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Step o$


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Step 6 o$


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Step 7 o$


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Step ; o$


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Step > o$


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Step 1@ o$


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Step 11 o$


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Addison Wesley

is an imprint of


Section 1.6

Visual Studio and Visual Basic 5-press 5dition#the Visual Basic 5n'ironment%

Visual Studio and Visual Basic 5-press

5dition consist o$ tools that you use to build Visual Basic applications.

he $irst step in using

Visual Basic is learnin about these tools.


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he Visual Studio I


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he Visual Basic 5n'ironment

utorial 1 introduces elements o$ the I

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