Oracle Forms: execute on canvas load

I have a form with 2 canvases. The first canvas has a button that loads the second canvas when pressed. Now I want to fill some data in a list item (that is in the second canvas) when the second canvas is loaded. There's the WHEN_NEW开发者_高级运维_ITEM_INSTANCE trigger on the list item but that doesn't seem to fire when the canvas is loaded. Any idea how I could do this?

Tried searching all around but haven't found anything useful.

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Just put your code in the button WHEN-BUTTON-PRESSED if there is no other way to reach second canvas.