DEFINE CLASS
class-name
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OBJECT
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USING |
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local-data-area |
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| data-definition
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LOCAL |
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USING |
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local-data-area |
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INTERFACE USING
copycode
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INTERFACE
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[PROPERTY ]
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[METHOD ]
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END-CLASS |
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This document covers the following topics:
For an explanation of the symbols used in the syntax diagram, see Syntax Symbols.
Related Statements: CREATE OBJECT | INTERFACE | METHOD | PROPERTY | SEND METHOD
Belongs to Function Group: Component Based Programming
The DEFINE CLASS statement is used to specify a class from
within a Natural class module. A Natural class module consists of one
DEFINE CLASS statement followed by an END statement.
| class-name |
This is the name that is used by clients to create objects of this class. The name can be up to a maximum of 32 characters long. The name may contain periods: this can be used to construct class names such as
Each part between the periods (...) must conform to the Naming Conventions for User-Defined Variables. If the class is planned to be used by clients written in different programming languages, the class name should be chosen in a way that it does not conflict with the naming conventions that apply in these languages. |
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| OBJECT | This clause is used to define the
object data. The syntax of the OBJECT clause is the same as for
the LOCAL clause of the DEFINE DATA statement. For
further information, see the description of the
LOCAL clause of the
DEFINE DATA
statement.
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| LOCAL |
This clause is only used to include globally unique IDs (GUIDs) in the class definition. GUIDs need only be defined if a class is to be registered with DCOM. GUIDs are mostly defined in a local data area. The syntax of the |
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| ID | The ID clause is used to assign a
globally unique ID to the class. The class GUID is the name of a GUID defined
in the data area that is included by the LOCAL clause. The class GUID is
a (named) alphanumeric constant. A GUID must be assigned to a class if it is to
be registered with DCOM.
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| INTERFACE USING | This clause is used to include
copycode that contains INTERFACE statements.
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| copycode | The copycode used by the
INTERFACE USING clause may contain one or more
INTERFACE statements.
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| PROPERTY | The PROPERTY statement is used to
assign an object data variable operand as the implementation to a property,
outside an interface definition.
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| METHOD | The METHOD statement is used to assign a
subprogram as the implementation to a method, outside an interface definition.
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| END-CLASS | The Natural reserved word
END-CLASS must be used to end the DEFINE CLASS
statement.
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