Add an Execute_query button in order to bring some results - Oracle Forms

Hi ! Experts!

I have the following requirement, to add a Refresh button on a Custom Form

The Form is Tabular and takes his data from a View of the PO Module.

In order to refresh some modifications of the Line, i was asked to add a button, but here is the issue.

The button has an Execute_query trigger When-Button-Pressed, but i need to bring the last query results not query all the form, just bring the lines wich i was working on.

What should i add in order to make it work?