4D v13.4On System Event database method |
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4D v13.4
On System Event database method
On System Event database method
The On System Event database method is called each time a system event occurs. This concerns all 4D environments: 4D (all modes) and 4D Server, as well as 4D applications that are compiled and merged with 4D Volume Desktop. To process an event, you must test the value of the $1 parameter within the method and compare it to one of the following constants, found in the Database Events theme:
These events are generated when a 4D application changes level, irrespective of the user action initiating this change. For example:
It is absolutely necessary to declare the $1 parameter (longint) in the database method. The structure of the database method code is therefore: // On System Event database method |
PROPERTIES
Product: 4D
INDEX HISTORY
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