ChildPageChanged Event
The ChildPageChanged event is triggered for a composite field when a child field receives a PageChanged Event.
This event has the following syntax:
on childpagechanged [compositefieldname]
compositefieldname is optional if you specify this event in a field script, or if the compositefield is the frame's top form.
The following attributes of the FrameExec class can be used in the ChildPageChanged event block:
TriggerField
Specifies the tabfolder field containing the page change
Originator
Specifies the composite field specified in the initial on childpagechanged statement
Usage: The ChildPageChanged event is defined for all composite fields.
The ChildPageChanged event is triggered by the user selecting a new page. The old TabPage is unmapped, and the new TabPage is mapped. The user can now start operating on the new page.
More information: