Visual basic ppt for tutorials computer

HOW TO WORK WITH VISUAL BASIC? Visual Basic (VB) is the third-generation event-driven programming language and integrated development environment (IDE) from Microsoft or its COM programming model. Visual Basic is relatively easy to learn and use.Visual Basic was derived from BASIC and enables the rapid application development (RAD) of graphical user interface (GUI) applications, access to databases using Data Access Objects, Remote Data Objects, or ActiveX Data Objects, and creation of ActiveX controls and objects. Scripting languages such as VBA and VBScript are syntactically similar to Visual Basic, but perform differently. A programmer can put together an application using the components provided with Visual Basic itself. Programs written in Visual Basic can also use the Windows API, but doing so requires external function declarations.The final release was version 6 in 1998. Microsoft's extended support ended in March 2008 and the designated successor was Visual Basic .NET (now known simply as Visual Basic).

HOW TO START VISUAL BASIC? FIG.1.1 NEW PROJECT WINDOW TO START VISUAL BASIC,THE STEPS ARE- 1.CLICK ON START PROGRAMS MICROSOFT VISUAL BASIC STUDIO 6.0 MICROSOFT VISUAL BASIC 6.0 2.THE NEW PROJECT WINDOW APPEARS (FIG.1.1) THE NEW PROJECT WINDOW HAS THREE TABS:- 1)NEW: TO START A NEW PROJECT. 2)EXISTING: TO SELECT FROM A LIST OF EXISTING PROJECTS. 3)RECENT: TO SELECT FROM THE LIST OF RECENTLY OPENED PROJECTS.IN THE NEW TAB ,SELECT STANDARD.EXE APPLICATION .THIS OPENS THE MICROSOFT VISUAL BASIC WINDOW.

COMPONENTS OF VB WINDOW Project window Properties window Properties layout window Form window Tool box Tool bar Menu bar Title bar FIG 1.2 COMPONENTS OF WINDOW

TITLE BAR:- THE TITLE BAR(FIG 1.3)APPEARS AT THE TOP OF THE VB WINDOW AND DISPLAYS TITLE OF THE PROJECT. BY DEFAULT THE VB GIVES NAME SUCH AS PROJECT1, PROJECT 2 . A VB APPLICATION WORKS ON 3 MODES:- FIG 1.3 TITLE BAR RUN MODE BREAK MODE DESIGN MODE

MENU BAR AND TOOL BAR MENU BAR- THE MENU BAR(FIG 1.4) CONSISTS OF MANY DROP-DOWN MENUS.CLICKING ON ANY OF THE OPTION OFTHE MENU BAR MAKES IT ACTIVE. TOOL BAR- THE TOOL BAR(FIG 1.4) HAS BUTTONS THAT PROVIDE SOME OF THE MENU OPTIONS. Menu bar Tool bar FIG 1.4 MENU BAR AND TOOL BAR

FORM WINDOW THE FORM WINDOW(FIG1.5) IS THE PRIMARY WORK AREA THAT FORMS THE BACKGROUND OF THE APPLICATION .THE USER CAN DRAW OBJECTS ON THE FORM. FIG. 1.5 FORM WINDOW

TOOLBOX THE TOOLBOX (FIG 1.6)CONTAINS ICONS THAT REPRESENT COMMONLY USED CONTROLS SUCH AS LABEL,TEXTBOX, COMMAND BUTTON ,ETC. FIG 1.6 TOOLBOX

PROJECT WINDOW IT DISPLAYS A LIST OF ALL FORMS THAT MAKES UP THE APPLICATION.IT HAS THREE BUTTONS ON THE TOP LEFT.(FIG 1.7) 1.CLICK ON VIEW OBJECT TO OPEN A FORM. 2.CLICK ON VIEW CODE TO OPEN CODE WINDOW. View Code View object Select form FIG 1.7 PROJECT WINDOW

PROPERTIES WINDOW THE PROPERTIES WINDOW LISTS THE PROPERTY OF THE SELECTED CONTROLS OR FOR THE FORM. THE PROPERTY WINDOW HAS TWO TABS: 1.THE ALPHABETIC TAB LIST ALL THE PROPERTIES IN ALPHABETIC ORDER.(FIG 1.8) 2.THE CATEGORIZED TAB LISTS THE PROPERTIES CATEGORY- WISE(FIG 1.9) FIG 1.8 ALPHABETIC TAB OF PROPERTIES WINDOW FIG 1.9 CATEGORIZED TAB OF PROPERTIES WINDOW

FORM LAYOUT WINDOW IT SHOWS THE POSITION OF THE FORM RELATIVE TO THE MONITOR’S SCREEN WHEN THE PROGRAM IS EXECUTED.(FIG 1.10) FIG 1.10 FORM LAYOUT WINDOW FAST FORWARD TO VIEW FORM LAYOUT WINDOW PRESS SHIFT+F4

DEVELOPMENT OF AN APPLICATION IN VB, AN APPLICATION CAN BE DEVELOPED BY THE FOLLOWING STEPS: 1.CREATE A FORM 2.PLACE CONTROLS ON TE FORM 3.SET PROPERTIES OR THE CONTROL 4.ADD CODE TO THE HANDLE THE EVENTS THE CONTROLS IN THE TOOLBOX CAN BE CALLED OBJECTS IN VB.EVERY CONTROL IS ASSOCIATED WITH ITS INDIVIDUAL PROPERTIES ,METHODS AND EVENTS.

PROPERTY IT IS THE NAMED ATTRIBUTE OF AN OBJECT FOR EXAMPLE,THE TEXT BOX HAS PROPERTIES SUCH AS COLOR,FONT,ENABLED,VISIBLE,ETC. METHOD IT IS AN ACTION THAT CAN BE PERFORMED ON AN OBJECT. EVENT WE KNOW THAT VB IS AN EVENT-DRIVEN PROGRAMMING LANGUAGE.A TEXT BOX SUPPORTS VARIOUS EVENTS SUCH AS CLICK,DOUBLE-CLICK,MOUSE UP ETC.WHEN AN EVENT OCCURS,A PARTICULAR CODE IS EXECUTED

HOW TO PLACE CONTROLS ON THE FORM? A CONTOL CAN BE PLACED ON A FORM USING TWO METHODS. FIRST METOD DOUBLE CLCK ON THE CONTROL IN THE ICON IN THE TOOLBOX. THE CONTROL APPEARS IN THE MIDDLE OF FORM.(FIG 1.11) FIG 1.11 CONTROL ON THE FORM

TO CHANGE THE POSITION OF THE CONTROL : FIG 1.12 DRAGGING THE CONTROL TO RESIZE THE CONTROL JUST CLICK ON THE CONTROL AND RESIZE THE POINTERS ON ITS EDGES AND CORNERS. i.DRAG THE EDGES POINTER FOR CHANGING THE SIZE EITHER HORIZONTALLY OR VERTICALLY.[FIG 1.13(a)] ii.DRAG THE CORNER POINTERS FOR CHANGING THE SIZE DIAGONALLY.[FIG 1.13(b)] FIG 1.13(a) RESIZING CONTROL VERTICALLY FIG 1.13(b) RESIZING DIAGONALLY DRAG IT TO THE NEW LOCATION. (FIG.1.12) CLICK THE CONTROL

SECOND METHOD CLICK ON THE CONTROL ICON IN THE TOOLBOX AND THEN CLICK ON THE DESIRED LOCATION ON THE FORM.DRAG THE MOUSE DIAGONALLY SO THAT THE CONTROL HAS THE DESIRED SIZE.(FIG 1.14) TO REPOSITION THE CONTROL ,HOLD DOWN THE LEFT MOUSE BUTTON AND DRAG THE CONTROL TO A NEW LOCATION, TO RESIZE THE CONTROL,CLICK THE CONTROL,DRAG ONE OF ITS EDGES OR CORNERS. FIG 1.14 DRAGGING DIAGONALLY

DELETE A CONTROL FORM OBJECT TO CREATE A VB APPLICATION ,WE NEED AN INTERFACE FOR THE USER TO INTERACT.THE FORM IS WHERE THE INTERFACE IS DRAWN.SOME OF THE COMMON PROPERTIES , EVENTS AND METHODS ARE: CLICK ON DELETE

PROPERTIES CAPTION : IT SETS THE TITLE OF THE FORM NAME : IT GIVES THE NAME OF THE FORM WITH WHICH IT IS REFERRED TO IN THE CODE.THE DEFAULT VALUE IS FORM. APPEARANCE: VALUE 1 MAKES THE FORM LOOK LIKE THREE- DIMENSIONAL.VALUE 0 MAKES THE FORM LOOK FLAT. FONT: IT SETS THE FONT TYPE ,FONT STYLE AND FONT SIZE FOR THE TEXT. FORE COLOR : IT SETS THE COLOR FOR THE TEXT ON THE FORM. ENABLED: VALUE TRUE MAKES THE FORM RESPOND TO MOUSE AND KEYBOARD EVENTS.VALUE FALSE MAKES THE FORM RESPONDING TO ANY EVENT. BACK COLOR: IT SETS THE FORM’S BACKGROUND COLOR. VISIBLE: VALUE FALSE MAKES THE FORM INVISIBLE

EVENTS CLICK FORM-CLICK EVENT IS TRGGERED WHEN THE USER CLICKS ON THE FORM . LOAD FORM-LOAD EVENT IS TRIGGERED WHEN THE FORM I LOADED.THIS LOADS THE FORM INTO THE MEMORY. METHODS PRINT THIS PRINTS TEXT STRING ON THE FORM. SHOW THIS MAKES THE FORM VISIBLE.IT IS THE SAME AS SETTING A FORM’S VISIBLE PROPERTY ON TRUE. HIDE THIS MAKES THE FORM INVISIBLE

LET US SEE HOW A VB APPPLIATION IS CREATED AND EXECUTED SUPPOSE WE WANT TO DISPLAY A MESSAGE ‘LEARNING VISUAL BASIC IS FUN’ ON THE FORM.THE STEPS TO CREATE EXEXCUTE AND SAVE VB APPLICATION FOR THIS MESSAGE ARE: CLICK ON START 1)

MICROSOFT VISUAL STUDIO CLICK PROGRAMS CLICK MICROSOFT VISUAL BASIC STUDIO 5) THEN CLICK ON MICOSOFT VISUAL BASIC 6.0 33 3) 4)

4.MAKE SURE FORM IS SELECTED IN THE PROJECT EXPLORER WINDOW. 5.IN THE PROPERTIES WINDOW i.CHANGE THE CAPTION MESSAGE. ii.SELECT THE BACKCOLOR OF THE FORM.CLICK ON THE DROP-DOWN ARROW ON THE RIGHT OF BACK COLOR AND SELECT A COLOR.MAKE SURE THE PALLETE TAB IS SELECTED.(FIG 1.16) FIG 1.16 BackColor Property

iii.SELECT THE FONT CLICK ON THE BUTTON TO THE RIGHT WITH THREE DOTS(FIG 6.17).THE FONT WINDOW APPEARS.(FIG 6.18) FIG 6.17 FONT PROPERTY FIG 1.18 FONT WINDOW

iv.SET THE FONT AS ARIAL,FOBT STYLE AS BOLD AND SZE AS 18;AND CLICK ON OK. 6.TO WRITE THE CODE: i. DOUBLE-CLICK ANYWHERE ON THE FORM TO GET THE CODE TEMPLATE(FIG 1.19). ii. BETWEEN THE TWO LINESOF THE TEMPLATE,TYPE THE FOLLOWING CODE(FIG 1.20) FIG 1.19 CODE TEMPLATE FIG 1.20 VB CODE

7.TO SAVE THIS VB APPLICATION: i. SELECT FILE SAVE TO FIRST SAVE THE FORM(FIG 1.21) AND THEN THE PROJECT (FIG 1.22). 8.TO RUN THIS VB APPLICATION: i. PRESS F5 OR CLICK THE START BUTTON ON THE TOOL BAR.(FIG 1.23) FIG 1.23 START BUTTON ON TOOLBAR Start button FIG 1.21 SAVE FROM FIG 1.22 SAVE PROJECT

9.THE OUTOUT OF THIS VB APPLICATION IS SHOWN IN (FIG 1.24). FIG 1.24 OUTPUT OF THE VB CODE FAST FORWARD TO RUN A PROGRAM PRESS F5

COMMON CONTROLS POINTER THE POINTER PROVIDES THE WAY TO RESIZE OR MOVE THE OTHER CONTROLS. THIS IS AUTOMATICALLY ACTIVATED AFTER THE USER PLACES A CONTROL ON THE FORM. TOP TIP THE POINTER IS THE ONLY CONTROL IN THE TOOLBOX THAT CANNOT BE PLACED ON THE FORM

LABEL LABEL IS A CONTROL THAT CAN BE USED TO DISPLAY TEXT THAT USER CAN EDIT DIRECTLY. PROPERTIES NAME: THIS GIVES THE NAME USED TO REFER LABEL IN THE CODE. CAPTION: THIS IS THE TEXT DISPLAYED IN THE LABEL. FONT: THIS SETS FONT,FONT STYLE AND FONT SIZE. BORDER STYLE: THIS DETERMINES THE TYPE OF BORDER. APPEARANCE: THIS IS 3-D IN APPEARANCE. EVENTS CLICK: THIS EVENT IS TRIGGERED WHEN THE USER CLICKS ON THE LABEL. DOUBLE CLICK: THIS EVENT IS TRIGGERED WHEN TH USER DOUBLE- CLICKS ON THE LABEL

TEXTBOX THE TEXT BOX IS A CONTROL THAT IS USED TO RECEIVE INPUT FROM THE USER AND ALSO TO DISPLAY THE OUTPUT.IT CAN HANDLE STRING(TEXT) AND NUMERIC DATA BUT NOT PICTURE OR IMAGES. PROPERTIES NAME: THIS IS THE NAME USED TO REFER TO THE TEXTBOX IN THE CODE. APPEARANCE: THIS IS 3-D OR FLAT IN APPEARANCE MAXLENGTH: THIS LIMITS THE LENGTH OF THE TEXT. VALUE 0 INDICATES LIMITED LENGTH. MULTILINE: THIS SPECIFIES WHETHER THE TEXTBOX DISPLAYS A SINGLE LINE OR MULTIPLE LINES.

PASSWORD CHAR: THIS HIDES THE TEXT WITH A SINGLE CHARACTER(USUALLY * IS USED). ENABLED: VALUE TRUE/FALSE DETERMINES WHETHER THE TEXTBOX RESPONDS TO ANY EVENT OR NOT. LOCKED: VALUE TRUE/FALSE DETERMINES WHETHER THE TEXTBOX RESPONDS TO ANY EVENT OR NOT. LOCKED: VALUE TRUE/FALSE DETERMINES WHETHER THE TEXTBOX CONTENTS CAN BE CHANGED OR NOT. TEXT: THIS IS THE STRING TO BE DISPLAYED IN THE TEXTBOX. EVENTS CHANGE: THIS EVENT IS TRIGGERED EVERY TIME WHEN THE TEXTBOX DISPLAYS A SINGLE LINE OR MULTIPLE LINE.

METHOD SetFocus: THIS POSITIONS THE CURSOR INSIDE THE TEXT BOX. COMMAND BUTTON THE COMMAND BUTON IS VERY IMPORTANT CONTROL AS IT IS USED TO EXECUTE COMMANDS AND IT DISPLAYS AN ILLUSION THAT THE BUTTON IS PRESSEDWHEN THE USER CLICKS ON IT. PROPERTIES APPEARANCES: THIS IS 3-D OR FLAT IN APPEARANCE. CAPTION: THIS IS THE STRING THAT IS DISPLAYED ON THE COMMAND BUTTON. VISIBLE: VALUE TRUE/FALSE DETERMINES WHETHER IT IS VISIBLE OR NOT. FONT: THIS SETS FONT,FONT STYLE AND FONT SIZE. ENABLED: VALUE TRUE/FALSE DETERMINES WHETHER IT RESPONDS TO AN EVENT OR NOT. EVENTS CLICK: THIS EVENT IS TRIGGERED WHEN IT IS SELECTED BY CLIICKING ON IT.

LET US NOW CREATE AN APPLICATION USING ALL THE COMMANDS DISCUSSED PREVIOUSLY THE STEPS TO CREATE ,EXECUTE AND SAVE A VB APPLICATION ARE : 1)SELECT PROGRAMS MICROSOFT VISUAL BASIC 6.0. 2)IN THE NEW PROJECT WINDOW,SELECT STANDARD. EXE.TH FORM WILL APPEAR ON THE SCREEN. 3)NOTICE THAT THE PROPERTIES OF THE FORM WILL APPEAR IN THE PROPERTIES WINDOW. i. SELECT CAPTION , AND TYPE ‘DISPLAY MESSAGE’. ii SELECT BackColor , AND CHANGE IT TO ORANGE.(FIG 1.25)

4)PLACE THE LABEL ON THE FORM AND CHANGE ITS PROPERIES AS SHOWN BELOW: PROPERTIES SETTINGS CAPTION ENTER YOUR NAME FONT 12,BOLD BackColor SAME AS FORM 5)PLACE ANOTHER LABEL ON THE FORM AND CHANGE IN PROPERTIES AS SHOWN BELOW: PROPERTIES SETTINGS NAME lblmessage FIG 1.25 CHANGED CAPTION AND BackColor

CAPTION (BLANK)[DELETE LABEL 2 THAT APPEARS ON THE RIGHT SIDE] BorderStyle 1-FIXED SINGLE FONT 12,BOLD 6) PLACE THE TEXTBOX ON THE FORM AND CHANGE ITS PROPERTIES AS SHOWN BELOW: PROPERTIES SETTING NAME txtname TEXT (BLANK) FONT 12,BOLD 7)PLACE COMMAND BUTON ON THE FORM AND CHANGE ITS PROPERTIES AS SHOWN BELOW: PROPERTIES SETTING NAME cmdok CAPTION OK FONT 12,BOLD 8)PLACE ANOTHER COMMAND BUTTON ON THE FORM AND CHANGE ITS PROPERTIES AS SHOWN BELOW:

PROPERTIES CONTROLS NAME cmdEXIT CAPTION EXIT FONT 12 ,BOLD 9)TO WRITE THE CODE,DOUBLE-CLICK ON THE OK COMMAND BUTTON TO GET THE CODE TEMPLATE.WRITE THE CODE AS SHOWN IN FIG 1.26 10)CLICK ON THE VIEW OBJECT BUTTON IN THE PROJECT EXPLORER WINDOW TO RETURN TO THE FORM. 11)DOUBLE-CLICK ON THE EXIT COMAND BUTTON TO GET CODE TEMPLATE.WRITE THE CODE AS SHOWN IN FIG.1.27 FIG 1.26 VB CODE

12) TO SAVE THIS VB APPLICATION,SELECT FILE SAVE PROJECT AS .THIS FIRST SAVES THE FORM AND THEN THE PROJECT. 13)TO RUN THIS APPLICATION,PRESS F5 OR CLICK THE START BUTTON ON THE TOOLBAR. TRICKY TERMS GUI- (GRAPHICAL USER INTERFACE)IT ENABLES THE USER TO INTERACT WITH AN APPLICATIONTHROUGH THE USE OF ICONS,BUTTONS,MENUS,DIALOG BOXES AND WINDOWS. EVENT-DRIVEN PROGRAMMING- A PROGRAMMING BASED ON THE EVENT(ACTION)PERFORMED. INTEGRTED DEVLOPMENT ENVIRONMENT- INTEGRATING MANY DIFFERENT FUNCTIONS SUCH AS DESIGNING,EDITING,COMPILING, DEBUGGING IN A SINFGLE WINDOW. FIG 1.27 VB CODE

MADE BY- MANTHAN SOMVANSHI AHLCON INTERNATIONAL SCHOOL

Visual basic ppt for tutorials computer

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Visual basic ppt for tutorials computer