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問題一覧
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is an Object-Oriented Language and development environment created by Microsoft in 1991
Visual basic
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BASIC means?
Beginners All-purpose Symbolic Instruction Code
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a form of use interface that allows users to interact with electronic devices through icons and visuals indicators.
Graphic User Interface
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Primary components of visual basic
Toolbox on the left, Design workplace in the middle, Properties on the right
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Features of visual basic
memory constraints, widespread applicability, object oriented framework, VB runtime, component object model
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The initial installation of VB requires a substantially large amount of memory. As the language provides a GUI-based development kit, it inevitably demands much space.
Memory Constraints
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Programmers prefer VB over other languages, thanks to the 'rapid application development' feature of VB.
Widespread Applicability
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Allows programmers to easily manage the functions of large, complex, and actively updated programs.
Object oriented framework
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divided into 2 section
visual basic runtime
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supports inter-process communication between different programming languages that can be integrated with VB development environment.
Component Object Model
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VB provides 'AutoCorrect' functionality that allows debugging of code while the program works in real time.
Miscellaneous Feature
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Uses of visual basic
Database software, Game development, Web development, Net software application, VBA application
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Are items that are positioned on the type. Also, a type is a control object
visual basic control
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Controls are the columns that aid in creating GUI based applications as quickly as possible.
vb.net
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explain the things
properties
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use to make the item do something
method
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explain what takes place when the user / Object - takes any action.
event
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It is made use of to input and accept textual input from the individual.
Text box
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Used to display descriptive text for the form in control
label
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Represents the standard Windows Button
button
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Used to display a list of items in Windows Form
List box
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used to display a drop-down list of various items.It is a combination of a text box in which the user enters an item and a drop-down list from which the user selects an item.
combo box
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used to provide a set of mutually exclusive options.
radio button
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allows the user to set true/false or yes/ no type options. The user can select or deselect it.
checkbox
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is used for displaying images on the form.
picture box
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display vertical and horizontal scroll bars on the form. This is used for navigating through large amount of information.
scroll bar
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It is used to provide visual feedback to your users about the status of some task. It shows a bar that fills in from left to right as the operation progresses.
progress bar
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used to display hierarchical representations of items similar to the ways the files and folders are displayed in the left panel of the Windows Explorer.
tree view
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used to display a list of items. Along with the Tree View control, it allows you to create a Windows Explorer like interface.
list view
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a complete instruction in Visual Basic programs. It may contain keywords, operators, variables, literal values, constants and expressions.
statement
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these are the statements where you name a variable, constant, or procedure, and can also specify a data type.
declaration statement
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these are the statements, which initiate actions. These statements can call a method or function, loop or branch through blocks of code or assign values or expression to a variable or constant.
executable statement
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a sequence of operators and operands that specifies a computation of a value, or that designates a variable or constant.
expression
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categories of statement:
declaration statement, executable statement