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Q. 1Design an application for addition , subtraction , multiplication and

division of two number.

1. Code for the subtract command (Command2). The code will be asfollows:

Private Sub Command2_Click()a = Val(Text1.Text)

b = Val(Text2.Text)

r = a - b

Text3.Text = r

End Sub

Code for the multiply command (Command3). The code will be as follows:


b = Val(Text2.Text)

r = a * b

Text3.Text = r

End Sub

Code for the divide command (Command4). The coding will be as follows:


b = Val(Text2.Text)

r = a / b

Text3.Text = r

End Sub

Start the coding for the add command (Command1). The code will be as

follows:


b = Val(Text2.Text)

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r = a + b

Text3.Text = r

End Sub

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Out put

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02 Design An Application For display factorial of a number , input by the

user .

Private sub command1 _ click ( )

Dim a , I, f As Double

i=1

f=1

a=val(text1.text)

while i

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OUT PUT

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Q.3 design an application for displaying Fibonacci series

Private Sub Command1_Click()

Dim x, g, n, i, sum As Integer

n = Val(Text1.Text)

x = 0

y = 1

Print x

Print y

For i = 3 To n

sum = x + y

Print sum

x = y

y = sum

y = sum

Next i

End Sub

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Out put

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Q.4 Design An Application For Displaying For A Calculator

Dim Op1, Op2 As Double

Dim Opr As String


Text1.Text = Text1.Text + Command1.Caption

If cleardisplay Then

Text1.Text = ""

cleardisplay = False

End If

End Sub


Text1.Text = Text1.Text + Command2.CaptionIf cleardisplay Then

Text1.Text = ""


End If

End Sub


Text1.Text = Text1.Text + Command3.CaptionIf cleardisplay Then

Text1.Text = ""


End If

End Sub




Text1.Text = ""


End If

End Sub

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Text1.Text = ""

cleardisplay = FalseEnd If

End Sub




Text1.Text = ""


End If

End Sub




Text1.Text = ""


End If

End Sub




Text1.Text = ""


End If

End Sub




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Text1.Text = ""


End If

End Sub




Text1.Text = ""


End If

End Sub

Private Sub CommandDot_Click()

If InStr(Text1.Text, ".") Then

Exit Sub

Else

Text1.Text = Text1.Text + "."

End If

End Sub

Private Sub Commandcls_Click()

Text1.Text = ""

End Sub

Private Sub CommandPlus_Click()

Op1 = Val(Text1.Text)

Opr = "+"

Text1.Text = ""

End Sub

Private Sub CommandMinus_Click()


Opr = "-"Text1.Text = ""

End Sub

Private Sub CommandMul_Click()


Opr = "*"

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Text1.Text = ""

End Sub

Private Sub CommandDiv_Click()

Op1 = Val(Text1.Text)Opr = "/"

Text1.Text = ""

End Sub

Private Sub CommandEqu_Click()


Select Case Opr

Case "+": Text1.Text = Op1 + Op2

Case "*": Text1.Text = Op1 * Op2

Case "-": Text1.Text = Op1 - Op2

Case "/": Text1.Text = Op1 / Op2

End Select

End Sub

Private Sub Commandexit_Click()

End

End Sub

Private Sub Form_Load()Text1.Text = ""

End Sub

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Q. 5 Design an application for displaying even numbers from 1 to 50.

dim a(50) as integer

dim i as integer

dim n as integer

private sub command_click()

for i 1 to 50

Next i

a(i) = inputbox ("enter any no.""no.""0")

Next i

for i = 1 to 50print a(i)

n=n/i

if n mod 2 = 0 then

Next i

end if

msgbox "even numbe"&even

end if

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OUT PUT

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Q.6 Design An Application For Counting Even And Odd Numbers.

using System;

using System.Collections.Generic;using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace Odd_and_even_numbers

{

public partial class Form1 : Form{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

try{

listBox1.Items.Clear();

int limit = Convert.ToInt32(textBox1.Text);

for (int i = 1; i

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try

{

listBox1.Items.Clear();

int limit = Convert.ToInt32(textBox1.Text);

for (int i = 2; i

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Q. 8Design an application for converting fahrenheit to Celsius and vice versa

Imports System.Web

Imports System.Web.Services

Imports System.Web.Services.Protocols

_

_

_

Public Class Service

Inherits System.Web.Services.WebService

_

Public Function HelloWorld() As String

Return "Hello World"

End Function

Public Function FahrenheitToCelsius(ByVal Fahrenheit As

String) As String

Dim fahr

fahr = Trim(Replace(Fahrenheit, ",", "."))

If fahr = "" Or IsNumeric(fahr) = False Then Return "Error"

Return ((((fahr) - 32) / 9) * 5)

End Function

Public Function CelsiusToFahrenheit(ByVal Celsius As

String) As String

Dim cel

cel = Trim(Replace(Celsius, ",", "."))

If cel = "" Or IsNumeric(cel) = False Then Return "Error"

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form target="_blank" action="Service.asmx/FahrenheitToCelsius"

method="POST">

Fahrenheit to Celsius:

Celsius to Fahrenheit:

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OUT PUT

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Q.9 Design an application for fill registration form and display

Private Shared kLibraryKey As String =

"3F76246B3B0E194506CBC8F512D70B9D0EF8242CEFA92E03237D7152AF

70DBD428ED559FBB90"

' The register state of the application which is computed when the form is

loaded

Private registered As Boolean

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles MyBase.Load

Try

Dim Proc As Process = Process.GetCurrentProcess()

' This call will display the trial dialogs if needed

Dim ret = InitTrial(kLibraryKey, Proc.MainWindowHandle)

' 0 return code means that the application is registered using a valid code,

otherwise is in trial

If ret = 0 Then

registered = True

End If

Catch ex As Exception

MessageBox.Show(ex.ToString())

Process.GetCurrentProcess().Kill()

End Try

End Sub

Private Sub DoRegister()

Try

Dim Proc As Process = Process.GetCurrentProcess()

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Dim ret = DisplayRegistration(kLibraryKey, Proc.MainWindowHandle)

' 0 return code means that the application was already registered or it

' has just been registered, otherwise is in trial

If ret = 0 Then

registered = True

End If

Catch ex As Exception

MessageBox.Show(ex.ToString())

Close()

End Try

End Sub

Private Sub AboutToolStripMenuItem_Click(ByVal sender As

System.Object, ByVal e As System.EventArgs) Handles

AboutToolStripMenuItem.Click

Dim dlg As AboutBox1 = New AboutBox1

' Set the about box member to the registered state computed when the

application loaded

dlg.registered = Me.registered

' Display the About box

dlg.Show()

End Sub

Private Sub RegisterToolStripMenuItem_Click(ByVal sender As

System.Object, ByVal e As System.EventArgs) Handles

RegisterToolStripMenuItem.ClickIf registered Then

MessageBox.Show("The application is already registered.", "Registered",

MessageBoxButtons.OK, MessageBoxIcon.Information)

Else

DoRegister()

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End If

End Sub

Into the AboutBox1.vb source file add the following code snippets:

...

Public registered As Boolean

Private Sub AboutBox1_Load(ByVal sender As System.Object, ByVal e As

System.EventArgs) Handles MyBase.Load

...

If Me.registered Then

Me.TextBoxDescription.Text = "registered - thank you"Else

Me.TextBoxDescription.Text = "trial"

End If

End Sub

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OUT PUT

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INDEX

S.NO. PROGRAMS

1 Design an application for addition , subtraction , multiplication and

division of two numbers.

2 Design an application for display factorial of a number, input by the

user.

3 Design an application for displaying Fibonacci series.

4 Design an application for a calculator.

5 Design an application for despising even numbers from 1 to 50.

6 Design an application for counting even odd numbers.

7 Design an application for checking user id and password in maximum

three attempts.

8 Design an application for converting Fahrenheit to Celsius and vice

versa .

9 Design an application for fill registration from display

10 Design an application that displays shapes as per the commands

selected on its menu . the menu displayed on the application should beas .

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PRACTICAL FILE

ON

VISUAL BASIC

SUBMITTED TO :- SUBMITTED BY :-

ASST. PROF NEHA BHARDWAJ KAVITA

ASST. PROF. GYANU GUPTA 2ND

YEAR 3RD

SEM

(CIVIL )

Mits Mits2013

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