Tab page navigating

Hi!
I have a canvas wich consist of four tab pages. Each tab page has a datablock. When the user clicks a tab, the cursor should be set in the datablock of the tab page. Any suggestions how to implement this?
My problem is that I have not found a function that returns the active(the one that is visible to the user) tab page.
Regards,
Morten

I think that you can use When-Tab-Page-Changed trigger on form level. In this trigger you can test :SYSTEM.TAB_NEW_PAGE variable.
IF :SYSTEM.TAB_NEW_PAGE = ... THEN
GO_BLOCK(...);
END IF;

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