Visual Basic Lab Manual

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INTRODUCTION TO VISUAL PROGRAMMING

Lab # 1

Objective: The objective is to review the basics of Visual programming. Theory

Visual Basic (Business All-purpose Symbolic Instruction Code)is a tool that allows you to develop Windows (Graphic User Interface - GUI) applications.

How to open Visual Basic 6.0 Step 1: First click on start menu. Step 2: Click on All programs.

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Visual Basic will open

New Project

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You must select/open Standard.Exe according to the above figure

Now, you can design a program by adding some tools like button, comobox, textbox, label etc. Program: 1 Write a program that display the message box of your name.

Solution:

Running a simple VB Program in Visual Basic 6.0 Step 1. First of all you have to select a form1.

Step 2. Now, select a button from toolbox and draw on the form1 that button. Step 3. Now change the caption of form1 and button1,

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Button1 = MessageBox

Step 4. Now, double click on button for code.

Step 5. After the code writing, you can run this program. For running program you must click on start button,

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Step 7: To stop the program now you click on End button,

Program 2: Write a program that add to numbers and display the answer. Solution

Step 1: Select Form1.

Step2: Add two textboxes (text box1 and text box2).

Step 3: Add three labels First for (Enter first value), second(Enter second value) and third (Answer). Step 4: Place a button also change the name property into Calculate.

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Step 5: Now double click on button calculate to write code,

Program 3: Write a program in which we input a number and that display it square. Solution

Step 1: Select form1.

Step 2: Add a label for Enter number for finding the square. Step 3: Add a text box in which you write any number. Step 4: Add two buttons by name of Exit and Calculate.

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Step 5: Now double click on the calculate button for code and exit button.

Program 4: Write code for cube according to the program 3. Solution:

Step 2: Add a label for Enter number for finding the cube of give number.

Step 3: Add two text boxes in which you write any number and other text box for display answer. Step 4: Add two buttons by name of Clear (both text boxes clear) and Calculate.

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Step 5: Now double click on the calculate button for code and clear button.

Program 5: Write a program in which you enter your marks and that display the Percentage and grade. Solution:

Step 2: Add two labels for Enter your marks and Enter total marks for finding the Percentage. Step 3: Add two text boxes in which you write your marks and total marks.

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Step 5: Now double click on the check button for finding percentage.

Lab # 2

Objective: The object is to understand the concept the if-statement.

Theory

THE if STATEMENT: To make a decision in simplest way in Visual Basic program is to use the If…Then statement.

Program 6: Write a program which compares two numbers, which number is greater/ less. Solution:

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Step 3: Add two text boxes in which you write numbers. Step 4: Add a buttons by name compare.

Step 5: Now double click on the compare button for the code.

Program 7: Write a program that get user name and password and show the next form. Solution

Step 1: Select form1 and form2

Step 2: Add two labels for User name and Password in form1. Step 3: Add two text boxes in which you write name and Password.

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Step 4: Add a buttons by name Sing in.

Form2

Step 5: Add a picture box then select a picture. Step 6: Add a button Log out that exit the program.

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Lab # 3

Objective: The object is to understand the concept of Select case statement.

Theory

SELECT CASE STATEMENT:

It is more flexible and a clearer format.

Program 8: Write a program that get marks from user and give output in Grade/Pass and fail. Solution:

Step 2: Add a labels for Enter your marks for Grade. Step 3: Add a text box for input the marks.

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Step 5: Now double click on the check button for the code.

Lab # 4

Objective: The object is to understand the concept of Loops.

Theory

Loop: It is a program that repeat certain number times the statement.

For Loop: The for loop execute the section of program a fixed number of times. Program 9: By using loop create a program that displays number from 1 to 10. Solution

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Step 2: Add a buttons by name Click Here

Step 3: Now double click on the button click here.

Program 10: By using For loop create a program that get base number and power from user and displays the power of a number.

Solution:

Step 2: Add two labels for Enter base and Power for finding power of a number. Step 3: Add two text boxes for input of numbers.

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Step 4: Add two buttons one for clear text boxes and next for calculate the power.

Step 5: Now write the code,

Program 11: By using while loop create a program that get a number from user and displays the power of a number.

Solution

Step 2: Add a label for Enter number. Step 3: Add text boxes for input of number. Step 4: Add a buttons for finding square.

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Program 12: Create a program that displays odd and even numbers. Solution

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Step 3: Write the code for odd and even number using for loop,

Program 13: Create a table by using loop. Solution

Step 2: Add a label for Enter number for which you want to display the table. Step 3: Add text boxes for input of number.

Step 4: Add a list box for displaying the result of table. Step 5: Add a buttons click here.

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Step 6: Now write the code for the table,

Program 14: Create a program to display 10 time hello world! Message by using do-while loop. Solution

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Program 15: Write a program for bold text and Italic font using check boxes. Solution

Step 2: Add a text box for input some text.

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Step 4: Now write the code of that program,

Program 16: Write a program that display time, date, month, year and day. Solution

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Step 3: Write the code of the program,

Program 17: By using check boxes write a program that display time, date, month, year and day. Solution

Step 2: Add five labels for display (month, year, hour, minutes and seconds). Step 3: Add five check boxes (month, year, hour, minutes and seconds). Step 4: Add a button OK.

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Step 5: Write the following code for the program,

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Code

Program 19. By using list box, write a program that get input (name), and perform add, remove, clear and font (Bold, italic and underline).

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Program 20: Create a program that show all types dialog boxes, like (OK only, Ok cancel, Yes No, Error, Exclamation, Information, try again etc).

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Program 21: By using Array write a program that gets input box user and display these number with their position.

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Strings

Program 22. Write a program that gets strings from user and concatenate the strings. Solution

Step 2: Add two text boxes for input some text.

Step 3: Add a button which concatenate both text boxes text. Step 4: Add two labels for display the concatenated result of text.

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Program 23. Write a program in you use like keyword which show the difference like True/False. Solution

Step 2: Add a button for Like Demo.

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Program 24. Write a program that in that works like a windows explorer, by using drives, folders, files and pictures, also show file’s location.

Solution

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Graphics

Program 25. Write a program that show a pixel point on the form.

Code

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Program 26. Write a program that print line, that gets input using two text boxes first(get border style from 0 to 6) and second (get border width).

Code

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Code

Program 28: Write a program that tells us the Location of button. Solution

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Code

Program 29: Write a program that displays the size (Height and width) of form. Solution

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Code

Program 30: write a program that draw a graphical picture of circle with different styles. Solution

Step 1: Select form1. Step 2: Add a picture box.

Step 3: Add three text boxes for input of number.

Step 4: Add two buttons for (Draw picture and remove the picture). Step 5: Add a check box for Auto Draw picture.

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