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How to over-ride the hook method WDDOEXIT of a component controller?

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  Here is my requirement:      
     >     I have a portal screen with links (accessing to many applications).

     >     The user is accessing an application, and he clicks on a link which actually navigates to another application. (PDC)

            

The navigation should not happen instantly, instead some more processing, like a pop up should be shown and based on further user action navigations should be carried out.

The only method that is called is WDDOEXIT. So i need to override this method.

 

Can i make use of wddostatechange( ). Please throw some light on this hook method as well.

 

Please let me know a work around solution.


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