1. Creating Windows Forms
Objectives
In this lesson, you will learn to:
Identify the features of Windows Forms
Identify various language features required to work with
Windows Forms
Identify various Windows Forms controls
Create Windows Forms
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2. Creating Windows Forms
Understanding the User Interface
A user interface is the means by which a user interacts with
an application. A well-designed user interface is an
effective means of making an application user-friendly.
Types of User Interfaces
Character user interface (CUI)
Graphical user interface (GUI)
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3. Creating Windows Forms
Windows Form
Is a representation of any window displayed in an
application.
Is used to accept input from a user and display information.
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4. Creating Windows Forms
Windows Forms (Contd.)
Windows Form properties:
Are used to determine the appearance of a Windows
Form at run time.
Some commonly used properties are:
®Name
®BackColor
®BackgroundImage
®Font
®Size
®StartPosition
®Text
®WindowState
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5. Creating Windows Forms
Windows Forms (Contd.)
Windows Forms events:
Click
Closed
Deactivate
Load
MouseMove
MouseDown
MouseUp
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6. Creating Windows Forms
Windows Forms (Contd.)
Windows Forms methods:
Show()
Activate()
Close()
SetDesktopLocation()
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7. Creating Windows Forms
Visual Basic.NET Language Features
Data types:
Byte
Short
Integer
Long
Single
Double
Decimal
Boolean
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8. Creating Windows Forms
Visual Basic.NET Language Features (Contd.)
Data types: (Contd.)
Char
String
Date
Object
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9. Creating Windows Forms
Visual Basic .NET Language Features (Contd.)
Variables
Allow you to store data.
Have a data type and a name.
Can be declared by using the Dim statement.
Arrays
Are collections of values of the same data type.
Contain elements that can be accessed using a single
name and an index number representing the position of
the element within the array.
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10. Creating Windows Forms
Visual Basic .NET Language Features (Contd.)
Are declared using the following syntax:
Dim arrayname(Number-of-elements) as
datatype
Can be resized using the Redim statement.
Operators
Are used to process the data entered by a user.
Can be categorized as follows:
®Arithmetic operators such as +, -, *, /, , and Mod
®Comparison operators such as =, , , =, =, and
®Logical operators such as And, Or, Not, and Xor
®Concatenation operators such as and +
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11. Creating Windows Forms
Visual Basic .NET Language Features (Contd.)
Control flow constructs
Decision structures
®If-then-else
®Select case
Loop structures
®While-End while
®Do-Loop
®For-Next
Nested control statements
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12. Creating Windows Forms
Just a Minute…
1. Write a loop structure to display all odd numbers between
1 and 100.
2. Write the construct to check whether the character stored
in the variable X is a vowel and display an appropriate
message.
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13. Creating Windows Forms
Problem Statement 2.D.1
For the Call Center application, a startup screen needs to be
provided to accept the user name and password. The
application should allow the user to enter the user name and
password for a maximum of three times. If in all of the three
attempts, a wrong user name and password is entered, the
application should display an error and close.
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14. Creating Windows Forms
Task List
Identify the variables required to store the values in the
application.
Identify the controls to be used for accepting input from the
user.
Identify the mechanism to validate the user input.
Create a Windows Form.
Add controls to the Windows Form.
Write the code to validate the user input.
Execute the application.
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15. Creating Windows Forms
Task 1: Identify the variables required to store the
values in the application.
Result:
The variables required for accepting the login details from a
user are:
Counter
Login Name
Password
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16. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user.
Visual Basic .NET provides a number of controls that can be
added to a form:
TextBox
®Is used to display text to a user or accept input from
a user.
®Has the following properties:
® Text
® Multiline
® Passwordchar
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17. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
Label
®Is used to provide information or description of
another control on the Windows Form.
®Has the following properties:
® Text
® AutoSize
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18. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
LinkLabel
®Is used to display the text as a link.
®Has the following properties:
® LinkColor
® ActiveLinkColor
® DisabledLinkColor
® LinkVisited
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19. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
ListBox
®Is used to display a list of items to a user.
®Can be populated by using the Add() method of the
Items collection.
®Has the following properties:
® SelectionMode
® Sorted
® SelectedIndex
® SelectedItem
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20. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
ComboBox
®Is used to display a drop-down list of items.
®Can be populated by using the Add() method of
the Items collection.
®Has the following properties:
® Text
® Sorted
® SelectedIndex
® SelectedItem
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21. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
CheckBox
®Is used to set Yes/No or True/false options.
®Has the following properties:
® Text
® Checked
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22. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
RadioButton
®Is used to provide a set of mutually exclusive
options to the user.
®Has the following properties:
® Text
® Checked
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23. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
GroupBox
®Is used to group related controls.
Button
®Is used to perform an action when a user clicks it.
®Has the Text property, which is used to set the text
displayed on the button.
StatusBar
®Is used to display the status information.
®Has the following properties:
® ShowPanels
® Text
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24. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
Some common properties found in most of the controls are:
Name
Visible
Location
Enabled
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25. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
Some common events found in most of the controls are:
KeyDown
KeyUp
KeyPress
MouseDown
MouseUp
MouseMove
ReSize
VisibleChanged
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26. Creating Windows Forms
Task 2: Identify the controls to be used for accepting
input from the user. (Contd.)
Result:
You will use the following controls for the given problem
statement:
Label
TextBox
Button
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27. Creating Windows Forms
Task 3: Identify the mechanism to validate the user input.
Result:
The program should use the If-Then construct to validate
the user name and the password. The If‑Then construct
can also be used to ensure that value of the counter is not
greater than 3.
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28. Creating Windows Forms
Task 4: Create a Windows Form.
Task 5: Add controls to the Windows Form.
Task 6: Write the code to validate the user input.
Task 7: Execute the application.
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29. Creating Windows Forms
Just a Minute…
You have created two forms named Form1 and Form2. Write
the code so that when a user clicks the OK button in Form1,
Form2 should be displayed.
©NIIT Creating Windows Forms/Lesson 2/Slide 29 of 30

30. Creating Windows Forms
Problem Statement 2.P.1
Diaz Telecommunications needs an application to accept
order details. The details to be accepted include order
number, date, customer ID, product ID, cost, and advance.
The product IDs should be displayed in a combo box. When
a user clicks the Save button after entering order details, the
application should verify that none of the fields is left blank
and display an appropriate message.
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31. Creating Windows Forms
Summary
In this lesson, you learned that:
A form is used to accept input from the user and present
information to the user.
An event gets generated on performing an action such as
clicking the mouse or pressing a key from the keyboard.
When an event is raised, the code within the event handler
is executed.
Variables are used to store data at run time. You can
declare a variable by using the Dim statement.
The decision structures supported by Visual Basic .NET
include:
If-Then-Else
Select-Case
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32. Creating Windows Forms
Summary (Contd.)
The loop structures supported by Visual Basic .NET are:
While-End While
Do-Loop
For-Next
Controls can be added to a form to accept input from the
user or display some information on the form.
Some commonly used controls are TextBox, Label,
CheckBox, RadioButton, and Button.
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