GEOS SDK TechDocs
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MetaClass
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2 Utility Messages
MSG_META_NULL, MSG_META_DUMMY
The following two messages are mainly place holders. They ensure that no message will have the value zero or one. (When a message is called, a value of zero equates to null.) These are not used by applications or objects in general.
void MSG_META_NULL();
This message has no handler and is unused. It essentially ensures that no other message will ever have the value zero.
Interception: Don't.
void MSG_META_DUMMY();
This message has no handler. You should not subclass this message to provide one. Certain object mechanisms, such as the resolution of a variant class, are activated by the object's receipt of
MSG_META_DUMMY
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Interception: Don't.
GEOS SDK TechDocs
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| MetaClass
| 2 Utility Messages