Sourabh Singh

7/28/2019 Sourabh Singh

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PRACTICAL FILE

VISUAL BASIC

(SESSION 2011-2014)

SUBMITTED TO: SUBMITTED BY:

Ms. SHRUTI TANIA MALHOTRA

ENROLLMENT NO. 03612401911

BBA (CAM) 4TH SEM

DELHI INSTITUTE OF RURAL DEVELOPMENT, DELHI

(AFFILATED TO GURU GOBIND SINGH INDRAPRASTHA UNIVERSITY)


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INDEX

Introduction to

visual basic

History

Program 1 Arithmetic operation

Program 2 Calculate simple interest

Program 3 Calculate D.A,H.R.A,P.F, & net salary

Program 4 Number is odd or even

Program 5 Swapping of two no. using third variable and without using third

variable

Program 6 Commonly used string function

Program 7 Given number is prime or not

Program 8 Check whether a string is palindrome or not

Program 9 Calculate total marks, percentage, and grade of 5 subject

Program 10 Input a no. from 1 to 7 and returns the Corresponding day of week

with the help of select case statement

Program 11 Calculate sum and average of 10 numbers using an array

Program 12 Display maximum and minimum

Program 13 Matrix addition using a two dimensional array

Program 14 Generate FIBONICCI series

Program 15 Calculate the table of a given no. also the factorial of a given no.

Program 16 Connect MS- access to visual basic


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INTRODUCTION TO VISUAL BASICS

Visual Basic

Visual Basic is athird-generationevent-driven programming

languageandintegrated development environment(IDE)

fromMicrosoftfor itsCOMprogramming model first released in 1991.

Visual Basic is designed to be relatively easy to learn and use. VisualBasic was derived fromBASICand enables therapid application

development (RAD)ofgraphical user interface (GUI)applications,

access todatabasesusingData Access Objects,Remote Data Objects,

orActiveX Data Objects, and creation ofActiveXcontrols and objects.

Thescripting languageVBScriptis a subset of Visual Basic.

A programmer can create an application using

thecomponentsprovided by the Visual Basic program itself. Programs

written in Visual Basic can also use theWindows API, but doing so

requires external function declarations. Though the program has

received criticism for its perceived faults, version 3 of Visual Basic was a
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runaway commercial success, and many companies offered third party

controls greatly extending its functionality.

The final release was version 6 in 1998. Microsoft's extended support

ended in March 2008 and the designated successor wasVisual Basic.

NET (now known simply as Visual Basic).

A dialect of Visual Basic,Visual Basic for Applications(VBA), is used as a

macro or scripting language within several Microsoft applications,

including Microsoft Office.

Language features

Like theBASICprogramming language, Visual Basic was designed to be

easily learned and used by beginner programmers. The language not

only allows programmers to create simpleGUIapplications, but to also

develop complex applications. Programming in VB is a combination of

visually arrangingcomponentsorcontrolson aform, specifying

attributes and actions of those components, and writing additional

lines ofcodefor more functionality. Since default attributes and actions

are defined for the components, a simple program can be created

without the programmer having to write many lines of code.

Performance problems were experienced by earlier versions, but with

faster computers and native code compilation this has become less of

an issue.
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Although VB programs can be compiled into native code

executablesfrom version 5 onwards, they still require the presence of

runtime libraries of approximately 1 MB in size. Runtime libraries are

included by default inWindows 2000and later, however for earlierversions ofWindows, i.e. 95/98/NT, runtime libraries must be

distributed together with the executable.

Forms are created usingdrag-and-droptechniques. A tool is used to

place controls (e.g., text boxes, buttons, etc.) on the form (window).

Controls haveattributesandevent handlersassociated with them.

Default values are provided when the control is created, but may be

changed by the programmer. Many attribute values can be modified

during run time based on user actions or changes in the environment,

providing a dynamic application. For example, code can be inserted into

the form resize event handler to reposition a control so that it remains

centered on the form, expands to fill up the form, etc. By inserting code

into the event handler for a key press in a text box, the program can

automatically translate the case of the text being entered, or evenprevent certain characters from being inserted. Visual Basic can create

executables (EXE files),ActiveX controls, or DLL files, but is primarily

used to develop Windows applications and to interface database

systems. Dialog boxes with less functionality can be used to provide

pop-up capabilities. Controls provide the basic functionality of the

application, while programmers can insert additional logic within the

appropriate event handlers. For example, a drop-down combinationbox will automatically display its list and allow the user to select any

element. An event handler is called when an item is selected, which can

then execute additional code created by the programmer to perform
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some action based on which element was selected, such as populating

a related list.

Alternatively, a Visual Basic component can have no user interface, and

instead provide ActiveX objects to other programs viaComponent

Object Model(COM). This allows forserver-sideprocessing or an add-in

module.

The runtime recovers unused memory usingreference countingwhich

depends on variables passing out of scope or being set to "Nothing",

resulting in the very common problem of memory leaks. There is a large

library of utility objects, and the language provides basicobjectoriented support. Unlike many other programming languages, Visual

Basic is generally not case sensitive, although it will

transformkeywordsinto a standard case configuration and force the

case of variable names to conform to the case of the entry within the

symbol table. String comparisons are case sensitive by default.

The Visual Basic compiler is shared with other Visual Studio languages

(C, C++), but restrictions in the IDE do not allow the creation of some

targets (Windows model DLLs) and threading models.

Characteristics

Visual Basic has the following traits which differ from C-derived

languages:

Statements tend to be terminated with keywords such as "End If",

instead of using "{}"s to group statements.
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Multiple variable assignments are not possible. A = B = C does not imply

that the values of A, B and C are equal. The Boolean result of " Is B =

C?" is stored in A. The result stored in A would therefore be either false

or true.

Booleanconstant True has numeric value 1. This is because the

Boolean data type is stored as a 16-bit signed integer. In this construct

1 evaluates to 16 binary 1s (the Boolean value True), and 0 as 16 0s

(the Boolean value False). This is apparent when performing

a Not operation on a 16 bit signed integer value 0 which will return the

integer value 1, in other words True = Not False. This inherent

functionality becomes especially useful when performing logical

operations on the individual bits of an integer such as And, Or, X

or and Not. This definition of True is also consistent with BASIC since

the early 1970s Microsoft BASIC implementation and is also related to

the characteristics of CPU instructions at the time.

Logical and bitwise operators are unified. This is unlike some C-derived

languages (such asPerl), which have separate logical and bitwise

operators. This again is a traditional feature of BASIC.

Variablearraybase. Arrays are declared by specifying the upper and

lower bounds in a way similar toPascalandFortran. It is also possible

to use the Option Base statement to set the default lower bound. Use

of the Option Base statement can lead to confusion when reading

Visual Basic code and is best avoided by always explicitly specifying thelower bound of the array. This lower bound is not limited to 0 or 1,

because it can also be set by declaration. In this way, both the lower

and upper bounds are programmable. In more subscript-limited
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languages, the lower bound of the array is not variable. This uncommon

trait does exist inVisual Basic. NETbut not inVBScript.

OPTION BASE was introduced by ANSI, with the standard for ANSI

Minimal BASIC in the late 1970s.

Relatively strong integration with theWindows operating systemand

theComponent Object Model. The native types for strings and arrays

are the dedicated COM types, BSTR and SAFEARRAY.

Banker's roundingas the default behavior when converting real

numbers to integers with the Round function. ? Round (2.5, 0) gives 2, ?

Round (3.5, 0) gives 4.

Integers are automatically promoted to reals in expressions involving

the normal division operator (/) so that division of one integer by

another produces the intuitively correct result. There is a specific

integer divide operator (\) which does truncate.

By default, if a variable has not been declared or if no type declaration

character is specified, the variable is of typeVariant. However this can

be changed with Deftype statements such

asDefInt, DefBool, DefVar, DefObj, DefStr. There are

12 Deftype statements in total offered by Visual Basic 6.0. The default

type may be overridden for a specific declaration by using a special

suffix character on the variable name (# for Double,! for Single, & for

Long, % for Integer, $ for String, and @ for Currency) or using the keyphrase as (type). VB can also be set in a mode that only explicitly

declared variables can be used with the command Option Explicit.
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PROGRAM 1

DEVELOP AN APPLICATION IN VISUAL BASIC TO PERFORM ARTHMETIC

OPERATIONS (+ , - ,* ,/)

DESIGN WINDOW


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CODING WINDOW


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OUTPUT


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Program 2

Develop an application to develop to calculate simple interest.

Design window


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Coding window


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Output


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Program 3

Design a simple calculator in v.b that takes an input basic salary and

calculate D.A,H.R.A,P.F and net salary.

D.A=basic salary

H.R.A=30% of basic salary

P.F=12% of basic salary

NET= basic salary + D.A+H.R.A+P.F.

DESIGN WINDOW


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Coding window


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Output


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Program 4

Develop an application in visual basic to check whether the given

number is either odd or even.

Design window


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Coding window


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Output


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Program 5

Develop an application to perform swapping of two number using the

third variable and without using third variable.

Design window


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Coding window


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Output


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PROGRAM 6

Develop an application in visual basic to explain a use of commonly

used string function?

DESIGN WINDOW


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CODING WINDOW


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OUTPUT WINDOW


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Program 7

Develop in application in visual basic to check whether a given number

is prime or not?

Design window


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Coding window


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OUTPUT


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Program 8

Develop an application in visual basic to check whether a string ispalindrome or not?

Design window


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Coding window


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Output


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Program 9

Design an application in visual basic to calculate the total marks,

percentage and grade of 5 subjects.

Design window


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Coding window


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Output


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Program 10

Design an application in visual basic that takes as input a number from

1 to 7 and returns the corresponding week day with the help of select

case statement.

Design window


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Coding window


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Output


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Program 11

Develop an application in visual basic to calculate sum and

Avg. of 10 no. using an array.

Design window


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Coding window


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output


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Program 12

Develop an application in visual basic to display maximum and

minimum number of 10 values entered with the held of an array.

Design window

Design window


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Program 12

Develop an application in visual basic to display maximum andminimum number of 10 values entered with the held of an array.

Design window


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Coding window


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OUTPUT


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Program 13

Design an application in visual basic to perform matrix addition using a

two dimensional array.

Design window


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Coding window


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Program 14

Design an application in visual basic to generate FIBONICCI series.

Design window


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Coding window


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Output


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Program 15

Develop a program in visual basic to generate or calculate the table of agiven number and also the factorial of a given number

Design window


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CODING WINDOW


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Output


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Step-2 ADD 4 lable & 4text boxes in visual basic. Give the caption to

the lable same as the field name in MS- access.


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Step-3 click on project menu and select components a dialog box willdisplay select Microsoft ADO data control 6.0 and click on apply.


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Step 4 A new control name ADODC will be added to the toolbox

double click on this control and bring it on the form.


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Step- 5 right click on the ADODC and select ADODC properties a new

dialog box will be displayed 5 tabs name general , authentication,

record source, font, colour.


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Step-6 three option for source of connection will be display. A data link

file is used for DAO connectivity ODBC data source name is used for

RDO connectivity & a connection string is used for ADO connectivity.


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Step-7 select the option button for used connection string and click on

build.


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Step 8 choose the connection provider for connectivity the

connection provider for MS-Access is Microsoft jet 4.0 OLEDB

provider click on next.


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Step 9 now select the database name. Click on text connection & if

connection is establish properly than a message with test connection

succeeded. Click on OK.


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Step-10 select the record source tab of ADODC properties. Now in

command type select 2 adcmd table. Now select the name of the

table which will be display if connection is established properly. Now

click on apply than ok.


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Step 11 now all the data is transfer to the ADODC to display the data

in the text boxes set the data source properties of all the data source to

ADODC and the data field property of all text boxes to individual

column name.


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Step 12 Now run the application and all the data will be display in the

text boxes.

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