Start

Input weight and height

Convert weight to kilogramsConvert height to meters

Calculate body mass index

Display body mass index

Flowchart

Is body mass> = 25?

Display“Normal”

Display “Overweight”

End

YesNo

Body Mass Program

Input Height and Weight

Convert inches to meters

Convert pounds to kilograms

Calculate Body Mass Index

Display Overweight or Not Overweight

Determine whether or not Body Mass Index >= 25

Hierarchy Chart

Pseudocode

• Input height in inches and weight in pounds– convert height to meters

• height in meters = height in inches / 39.37

– convert weight to kilograms• weight in kilograms = weight in pounds * .454

• Calculate body mass index– body mass index = weight / height2

• If body mass index >= 25 display “Overweight”

Else display “Not Overweight”

Additional Controls and GUI Guidelines

Text Controls• Label control

– displays text entered by the program designer

– used for output or labeling components on the form

• Text Box control

– places text entered by the user on the form

– used for input from the user

• List Box control

– displays a list of items

• Combo Box control

– combines features of list box and text box

Buttons• Command Button control

– Places a button on a form that the user clicks to invoke an event

• Option Button control– enables the user to make one selection from a

group of choices• Check Box control

– enables the user to turn an option on or off, or set values to true or false

Containers• Picture Box control

– used to store a graphic image • Image control

– used to place an image on the screen– the image can be clicked, like a command

button, to invoke an event• Frame control

– serves as a container for other controls.– used to visually separate related controls from

other controls on the form

Image and Picture Boxes

• Allow you to load up images from the disk and display on the screen– at design time– at run time

Loading Graphics at Design Time

• Use the Picture property of– images– pictureBoxes– forms

Loading Graphics at Run Time

• The LoadPicture function loads a new image into the Image or PictureBox control during run time

• Example:– Image1.Picture = LoadPicture(“C:\pic\city.bmp”)

• only a pointer to the file• image file name must include complete path• must remember to include graphics files with the

application

PictureBox Control’s AutoSize Property

• Determines whether a control is automatically resized to display it’s entire contents.

• If set to True, the PictureBox dimensions adjust to the size of the contents.

Image Control’s Stretch Property

• Setting the stretch property to true makes the size of the image conform to whatever size you set the Image control.

• The default value, false, means the image control will take on the size of the image that is loaded into it.

Image vs. PictureBox Controls

• Image controls stretch the image, picture boxes do not

• Image controls use less computer resources

• Image controls have fewer properties, events and methods

• PictureBoxes can be used as container objects (allows other controls to be drawn inside of it) or to display output with it’s Print method.– picResults.Print “Hello World”

GUI Guidelines for Layout and Organization of the

Interface• Make your design consistent with the

Windows standards.• Have the information flow either vertically

or horizontally, with the most important information located in the upper-left corner of the screen.

• Use frames or white space to group related controls together.

GUI Guidelines for Layout and Organization of the

Interface (cont.)• Limit the number of command buttons in

the interface to six and put the most commonly used buttons first.

• Command buttons should be either centered along the bottom of the screen or stacked in either the upper-right or lower-left corner of the screen.

GUI Guidelines for Layout and Organization of the

Interface (cont.)• Identifying labels should be left-aligned and

positioned either above or to the left of the control and should end with a colon.

• Identifying labels, including captions, should be from one to three words only and should appear on one line.

Getting Help

• Online help– MSDN Library for Visual Studio

• Microsoft web site– http://msdn.Microsoft.com/vbasic/

• Additional texts– Beginning Visual Basic 6 by Peter Wright

• Wrox Pres• ISBN 1-861001-05-3