On Page Change

Code	Pode ser chamado por	Definição
56	Formulário	A página atual do formulário é alterada

Descrição

This event is only available at the form level (it is called in the form method). It is generated each time the current page of the form changes (following a call to the FORM GOTO PAGE command or a standard navigation action).

Note that it is generated after the page is fully loaded, i.e. once all the objects it contains are initialized, including Web areas.

A única exceção são as áreas 4D View Pro, para as quais você precisa chamar o evento específico On VP Ready.

The On Page Change event is useful for executing code that requires all objects to be initialized beforehand. You can also use it to optimize the application by executing code (for example, a search) only after a specific page of the form is displayed and not just as soon as page 1 is loaded. Se o usuário não for a esta página, o código não é executado.