VISUAL BASIC is evolved from the earlier DOS version called BASIC. BASIC means “Beginners Allpurpose Symbolic Instruction Code”. It has been around for more than 35 years. BASIC was further developed as Visual Basic to make it compatible with today’s environment. Microsoft created the enhanced version of BASIC, called visual basic. The bottom line of …
VISUAL BASIC makes use of GRAPHICAL USER INTERFACE (GUI) for creating robust and powerful applications. A simple GUI looks like this: GUI given above shows graphical interaction between user and system. That is why a GUI is an effective mean of making your application user friendly and is the key to creating successful applications. GUI …
VISUAL BASIC IDE (INTEGRATED DEVELOPMENT ENVIRONMENT ) is the environment in which its program are written and executed. IDE stands for Integrated Development Environment. IDE is a term commonly used to describe the interface and environment for creating your application. It is called IDEbecause you can access all of the development tools that you need for developing an application. For Animated …
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Visual Basic is the most sophisticated tool for developing commercial applications .Various information system are implementing in VISUAL BASIC today,these are as follows: Various information system are implementing in VISUAL BASIC today,these are as follows: MIS(Management Information System), EIS(employee Information System), Inventory control, ERP(Enterprise Resource Planning), Web application, Library Management System Etc. VISUAL BASIC is …
Visual Basic supports different types of data types according to the needs of program or application You can say that attribute of a variable that determines what kind of data it can hold is known as Datatype. By Default Visual Basic supports the variant data type.Declaring a variable variant indicates that it can support all …
Any programming language requires to store values temporarily for different purposes like calculations Adding, multiplying etc.Visual Basic gives the need for variables. You can think of variable, a place in memory of computer for an unknown value. For example when you call someone, then you call him /her by name, like that every variable has name. Variable name is …
Constants as the name suggests , never change during the execution of program.They remain same throughout the program execution. When the user wants a value that never changes, a constant can be declared and created. The syntax for declaring a constant is: (Public|Private) Const constantname (As type) = expression The const statement can be declared …
A module is a set of functions and a set of data members.Code in Visual Basic is stored in the form of Modules. Collection of general procedures, variable declarations, and constant definitions used by application is known as module. Mainly Visual Basic supports 3 types of modules: (1) Form module (2) Standard Module (3) Class …
An array is the collection of similar data types.The individual elements of an array is identified by using an index. Each index number in an array is allocated individual memory space. Hence users declare arrays of larger size than required. Array helps in creating smaller and simpler code in many situation.You can setup loops that …
Syntax: Dim arrayname(number) as Datatype Example: Dim total(10) as integer Here total is name of array ,10 is no of elements in the array & integer is the data type.Number 10 included in the parenthesis is the upper limit of the array. The above declaration creates an array with index numbers ranging from 0 to …
The If…Then statement is used to evaluate whether a condition is True or False. You can use If…Then block to execute one or more statements conditionally. Syntax: If <condition> Then [statements] Else [else statements] End If Example: if a>5 Then a=a+10 Here condition is that ‘a’ should be greater than 5 and if it is …
It conditionally executes a group of statements depending upon value of the expression. If…Then…Else block is used to define several blocks of statements ,in order to execute one block. Syntax: If <condition>then [statements] Else if <condition>Then [else if statement] . . . Else [elsestatement] End If Example: If a<10 then a=a+10 elseif a>15 then a=a-10 …
It is just as the alternative of If…Then…Else statement.It executes one statement in several groups of statements. A Select Case provides the same functionality as the If…then…Else statement but it makes the code more efficient and readable A Select Case works with a single test expression. Value of the statements will be dependent on test …
Do…loop is used to execute a block of statements for indefinite number of times. There are several variations of Do…Loop statement. Each variation evaluates a numeric condition to determine whether to continue execution or not. Syntax: Do While <condition> statements… Loop Note that: 1.When Visual Basic executes Do While loop, it first tests condition. 2.If …
For…Next loop is used when you know how many times you want to execute loop.But in case of Do While it is not the case. Do While is used when you do not know how many times you want to execute that particular loop/Condition. Syntax: For counter = start To end [Step increment] statements Next …
A Sub procedure is a block of code that is executed in response to an event. By breaking the code in a module into Sub procedures, it becomes much easier to find or modify the code in your application. Syntax: [Private|Public][Static]Sub procedurename (arguments) statements End Sub Each time when procedure is called, the statements between Sub and End Sub are executed. Sub procedures can be placed in …
Function Procedures return values. you can use Function statement to write your own Function procedures. Like a Sub procedure, a Function procedure is a separate procedure that can take arguments, perform a series of statements, and change the value of its arguments. Syntax: [Private|Public][Static]Function procedurename (arguments) [As type] statements End Function Note that: 1.You call …
Property procedures are the procedures that return values and also assign values to the property of objects. Visual Basic provides three kinds of property procedures, as described in the following table. Procedure Procedure Property Get Returns the value of a property. Property Let ets the value of a property. Property Set Sets the value of an object …
A function is a preprogrammed calculation .It can be carried out on request from any point in a Visual Basic program. A function takes one or more arguments and returns a single value and it can be included in an expression. Argument: It is a value on which a function or procedure operates. For example, …
Methods are associated with objects, and define the actions they carryout for their object. For Example: The methods of your radio are on, off, volume control etc, Which give you control on your radio.Each Method performs a particular action. Method is an action that an object is capable of performing. For example: list boxes have …