1st lab session

7/24/2019 1st Lab Session

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1STLAB SESSION


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INTRODUCTION Three mode :

Design time

Run Time

Break Time


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TYPES OF FILE IN VB PROJECT A project .vbp

A form .frm

A module .bas

A workspace.vbw A control set .ocx


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pen !icrosoft "isual Basic #.$ in %our

computer please&


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VISUAL BASIC ENVIRONMENT

'. (orm


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DETERMINE THE SIZE OF THE

FORM

Border is being dragged.

(igure '.': Determine the si)e of the form


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DESCRIPTION OF THE PROPERTIES

Name Of The

Property

Description Of The Property

Name Name referred to in code window.

Caption Name of the object that will be seen on the title bar.

Icon Icons that will be displayed when the form is

minimised.MaxButton

and MinButton

Determine if the form can be minimised or

maximised.

WindowState Determine the start up position, whether it

is maximised, minimised or put in the normal size.

Heiht and

Width

Determining the size of the form.

!eft and Top Determining the location of the form, from

the upper left corner.

Table '.$: Description f The *roperties


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+. *roject ,xplorer


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-. *roperties indow

The list of

*roperties

Description of

each properties


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/. Toolbox0abel

(rame

1heckBox

1omboBox

23crollBar

Timer

Dir0istBox

3hape

4mage

0,

*ictureBox

Textbox

1ommandButton

ptionButton

0istBox

"3crollBar

Drive0istBox

(ile0istBox

0ine

Data


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Text Boxes

5se when %ou want the user to t%pe some

input or displa% output.

,xample :

5se Text*ropert%.

*refix naming 6 7txt89txtTitle.

Text Box


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Progra Co!e For Text Boxes

,xample ' :

lbl;ame.1aption < txt;ame.Text

=4nputfrom user enter into the text box isassignedto the caption propert% of lbl;ame.

,xample + :

txt!essage.Text < >atson? come here@

=Displa% textin a text box during program

execution? assign a literal to the Text propert%.


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Fraes 5se as containersfor other controls.

,xample :

roupsof option buttons or check boxes.

!ake form easierto understand.

*refix naming 6 fra9fra1olor.

(orms must be drawn first than onl% option buttons

into the frame.


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C"e#$ Boxes

Allow the user to select 9or deselectan option. ,xample :

4n an% group of check boxes? an% numberma% be

selected. "alue propert%of a check box is set to $if

unchecked? 'if checked? or +if gra%ed9disabled. *refix naming 6 7chk8 9chkBold.


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Progra Co!e For C"e#$ Boxes

= 3et the initial value for check boxes :

Example 1 :

chkBold.Value = 1 Make box checkedchkBold.Value = 0 Make box unchecked

Example 2 :

chkBold.Value = Checked Make box checkedchkBold.Value = Unchecked Make box unchecked


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O%t&o' B(tto's

5se when onl% one button of a groupma% beselected.

,xample :

"alue propert%of an option button is set toTrueif selectedor to (alseif unselected.

*refix naming 6 7opt8 9optRed.


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Lo#ate T"e O%t&o' B(tto'

An% option button placeddirectl% on the

form9not in a frame function as single

event.

A group of option buttons inside a frame

function together.

* The best method is to first create a frame and then create eachoption button inside the frame.

* Must be careful to create the button inside the frame, dont

create it on the form and drag it inside the frame its still

belongs to the forms group, not the frames group.


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Progra Co!e For O%t&o' B(tto'

= To make an option button appear selected

initiall% :

Example :

optRed. Value = True Make button selected


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Iages

1ontrol that holds a picture.

,nable to set an image8s *icture propert%to

a file with an extension of .bmp? .wmf?

.ico? .dib? .gif? .jpg? .emf? or .cur. 3et 3tretch propert%to Trueto make the

picture enlargeto fill the control.

3et "isible propert%to (alseto make the

image disappear. *refix naming 6 7img8 9img*icture.


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Progra Co!e For Iages

=!ake an image invisible at run time.

Example :

imgLogo.Visible = False


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Sett&'g a Bor!er a'! St)*e

!ost controls can appear to be -dimensional

or flat.

0abels? text boxes? check boxes? option

buttons and images all have an Appearancepropert%.

$ 6 (lat or ' 6 -D.

= To make a label or an image appear -D? %ou must give it aborder.

= 3et the Border3t%le to ' 6 (ixed 3ingle.


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S"a%e Co'tro* *lace shapeson a form :

i Rectangleii 3Cuares

iii vals

iv 1ircles

,xample :

*refix naming 6 7shp8 9shp1ircle.


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S"a%e %ro%ert)

Determine the shape b% settingits 3hape

propert%:

$ Rectangle' 3Cuares

+ vals

- 6 1ircles

/ 6 Rounded Rectangle

6 Rounded 3Cuares


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L&'e

Draw lineon a form.

,xample :

*refix naming 6 7lin8 9lin0ogo.

0ine


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CREATIN+ FIRST APPLICATION

Refer our module8s book at page '


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TRY DESI+N THIS INTERFACE,,

command

button

textboxlabel


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1st lab session

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