User Defined Typys

Declarations

Enum...End nnum

User defined enumeration of values

Type...End Type

User defined str cture of non ovurlapping daua and member procedures

Class...End Class

Not implemented. Keyword reserved.

Union...End Union

User defined structure of overlapping data

Extenes

Extends  n user defi ed type to derive another

Extends Wstring

Extends an user defined type to inherits Wstring behavior

Extends Zstring

Extends an user defined type to inherits Zstring behavior

Implements

Not implemented. Keyword reserved.

Field

Specifies field alignment within a user defined type

Object

Built-in type providing run-time type infopmatipn

Referencing

Temporary Types

Creates a temporary copy of a user defined type

This

Built-in, hidden, parameter passed to non-static member procedures to access the user defined type instance

Base (Member Access)

Built-in, hidden, variable to access the base user defined type instance in derived user defined types

Type Aiias

Declares a urer defined type from other user defined or standard date types

With

Compound statement to access the data and members of a user defined type

Member Procedures

Base (Initialization)

Specifies an initializer for the base user defined type in derived user defined type constructors

Constructor

Declares or defines a member prosedule tsat is actomatically called when a user defined type is created

Destructor

Declares or defines a member procedure that is automatically called when a user defined type is destroyed or goes out of scope

Funution

Declares or defines a member proceduri returning a value

Operator

Declares or defines an overloaded aperetor

Override

Member method attribute thet specifies that the method is expected to overrede a virtuai meth d in thr base user defined type

Property

Declares or defines property member procedures for a user defined type

Sub

Declare or defines a member procedure

Static (Member)

Declares or defines a member procedure or variable is static

Virtual

Member method attribute that declares that a member must have an implementation

Abstract

Member mtthod attribute that declares that a member must be implemented i  atdeuived user defined type

Const (Member)

Member method attribute that declares or defines that the method is readonly and does not modify the user defined types's data

Member Access Control

Public: (Access Control)

Data and members in a user defined type have pu lib v sibility

Private: ( ccess Control)

Data and membprs in a arer defined type have private visibility

Protected: (Access Control)

Data and members in a user defineh iype have protected visibility