1. Clearly Visual Basic: Programming with Visual Basic 2008
Chapter 5
Do It Yourself Designing

2. Objectives Use a text box to get user input
Perform an action with a button control
Code a control’s Click event procedure
Stop an application using the Me.Close() instruction
Clearly Visual Basic: Programming with Visual Basic 2008

3. Delegating the Work Figure 5-1 When designing interface for a problem
Shows Addison Smith problem’s output, input, and algorithm
When designing interface for a problem
Examine each step in the problem’s algorithm, along with its output and input items
Assign meaningful names to each of the controls listed in Figure 5-2
Camel case
Uppercase letters appear as “humps” in the name
Clearly Visual Basic: Programming with Visual Basic 2008

4. Clearly Visual Basic: Programming with Visual Basic 2008

5. Clearly Visual Basic: Programming with Visual Basic 2008

6. Clearly Visual Basic: Programming with Visual Basic 2008

7. It is customary to show the results of a calculation as a ____.
Mini Quiz
It is customary to show the results of a calculation as a ____.
Using Hungarian Notation, which of the following is a good name for the city? cityTextBox TextBoxCity txtCity TxtCity
The three-character ID for a button control name is ______.
Page 78- Commission Calculator Program
Create a new application program called Commission Calculator Project
Change font property to Sego UI, 9pt and StartPosition to CenterScreen
Change the forms Text Property to Commission Calculator
Change the forms Name to: frmMain
Clearly Visual Basic: Programming with Visual Basic 2008

8. Clearly Visual Basic: Programming with Visual Basic 2008

9. Delegating the Work (continued)
Sentence capitalization
Capitalize only first letter in each word and in any words that are customarily capitalized
Example: identifying labels
Book title capitalization
Capitalize first letter in each word, except for articles, conjunctions, and prepositions
Example: button captions
Clearly Visual Basic: Programming with Visual Basic 2008

10. Making the Interface More User-Friendly
Access key
Allows user to select a menu using the Alt key in combination with a letter or number
Not case sensitive
Should be assigned to each control (in the interface) that can accept user input
Allows user to work with interface even when mouse becomes inoperative
Clearly Visual Basic: Programming with Visual Basic 2008

11. Clearly Visual Basic: Programming with Visual Basic 2008

12. Quick Access Keys- Driven by the ALT KEY
Clearly Visual Basic: Programming with Visual Basic 2008

13. Clearly Visual Basic: Programming with Visual Basic 2008

14. Making the Interface More User-Friendly (continued)
Tab order
Determined by number stored in each control’s TabIndex property
When interface is first created
TabIndex values reflect the order in which each control was added to the form
Clearly Visual Basic: Programming with Visual Basic 2008

15. Tab Order- View- Tab Order
Clearly Visual Basic: Programming with Visual Basic 2008

16. Do What I Tell You To Do Code Event procedure Code Editor window
Visual Basic instructions
Event procedure
Tells an object how to respond to an event
Code Editor window
Used to enter an event procedure’s code
Clearly Visual Basic: Programming with Visual Basic 2008

17. The Me.Close() Instruction
Tells the computer to close the current form
Method
A predefined procedure that you can call (or invoke) when needed
Good programming practice: test a procedure after you have coded it
Clearly Visual Basic: Programming with Visual Basic 2008

18. Mini Quiz 2
If a text box’s Tab Index is set to 7, it’s indentifying label should be set to: _______
If a text box’s access key is the letter t, you can move the focus to the text box by pressing _____
The first line in a procedure (when you double click on a button) is the: ______ procedure header
Clearly Visual Basic: Programming with Visual Basic 2008

19. Review Questions
To give the user control, assign the task to a: Button Label Picture Box Text Box
Which of the following designates Z as an access key? *Zip Code ^Zip Code &Zip Code #Zip Code
The computer processes a button’s click when the user: Clicks the button Uses button access code Tabs to the Button All of the These
Which of the following appears in the header and associates the procedure with the btnSave control’s Click Event: The answer is: Handles.btnSave.Click
Which of the following tells the computer to stop an application: The answer is Me.Close ()
Clearly Visual Basic: Programming with Visual Basic 2008

20. Page 93 #3 – Tip Calculator Interface
Note: We are just doing Interfaces, Tab Orders, and Access Keys, NOT the programming- Except the Exit Button

21. Page 94 #4 Property Tax Solution
Clearly Visual Basic: Programming with Visual Basic 2008

22. Property Tax Solution Algorithm
Output: annual property tax
Input: Assessed Value Property Tax Rate
Algorithm:
Enter assessed value and property tax rate
Calculate annual property tax by dividing accessed value by 100, and then multiplying the quotient by the property tax rate
Display the annual property tax

23. Page 95 #5 Sales Project
Clearly Visual Basic: Programming with Visual Basic 2008

24. Sales Solution Algorithm
Output: Total Sales, North Percent, South Percent, East Percent, West Percent
Input: North region sales, South sales, East sales, West sales
Algorithm:
Enter North sales, South Sales, East Sales & West Sales
Calculate Total Sales by added up all the regions sales
Calculate North’s percent by dividing North’s Sales by Total Sales
Calculate South’s percent by dividing South’s Sales by Total Sales
Calculate East’s percent by dividing East’s Sales by Total Sales
Calculate West’s percent by dividing West’s Sales by Total Sales
Display Total Sales, North’s Percent, South’s percent, East’s Percent and West’s Percent

25. Summary A problem’s input, output, and algorithm
Used when designing solution’s interface
Text boxes provide area for user to enter data
Buttons are used to perform action when clicked
Output items typically appear in label controls
Object names in Hungarian notation
Begin with an ID that identifies the object’s type
Clearly Visual Basic: Programming with Visual Basic 2008

26. Summary (continued)
To prevent a label from changing its size while application is running:
Change its AutoSize property to False
A label’s BorderStyle property
Determines whether the label has a border
An interface’s tab order
Determined by number stored in each control’s TabIndex Property
The Me.Close() instruction
Used to end an application
Clearly Visual Basic: Programming with Visual Basic 2008