Declared Element Characteristics (Visual Basic)
A characteristic of a declared element is an aspect of that element that affects how code can interact with it. Every declared element has one or more of the following characteristics associated with it:
-
Data type — the values the element can hold, and how it stores those values. For more information, see Data Type Summary (Visual Basic).
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Lifetime — the period of execution time during which the element is available for use. For more information, see Lifetime in Visual Basic.
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Scope — the set of all code that can refer to the element without qualifying its name. For more information, see How to: Control the Scope of a Variable (Visual Basic).
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Access level — the permission for code to make use of the element. For more information, see How to: Control the Availability of a Variable (Visual Basic).
The following table shows the declared elements and the characteristics that apply to each one.
|
Element |
Data Type |
Lifetime |
Scope 1 |
Access Level |
|---|---|---|---|---|
|
Variable |
Yes |
Yes |
Yes |
Yes |
|
Constant |
Yes |
No |
Yes |
Yes |
|
Enumeration |
Yes |
No |
Yes |
Yes |
|
Structure |
No |
No |
Yes |
Yes |
|
Property |
Yes |
Yes |
Yes |
Yes |
|
Method |
No |
Yes |
Yes |
Yes |
|
Procedure (Sub or Function) |
No |
Yes |
Yes |
Yes |
|
Procedure parameter |
Yes |
Yes |
Yes |
No |
|
Function return |
Yes |
Yes |
Yes |
No |
|
Operator |
Yes |
No |
Yes |
Yes |
|
Interface |
No |
No |
Yes |
Yes |
|
Class |
No |
No |
Yes |
Yes |
|
Event |
No |
No |
Yes |
Yes |
|
Delegate |
No |
No |
Yes |
Yes |
1 Scope is sometimes referred to as visibility.
