[This is preliminary documentation and subject to change.]
The syntax for this event is different than for other controlevents! In place of the name of the event one puts the property in square brackets: [property_name]. The argument is the new value of the property. To unset the property, the argument must be {}. This is necessary, because the argument is a primary key in the table, so it cannot be null. The argument will be formatted using the FormatText method, therefore it can contain any expression that the method can handle. The property values are evaluated at the moment of the control event.
Handler.
The new value of the property. {} for null.
None.
None.
A PushButton control on a dialog linked to this event so it changes a property when the button is pushed.