USer Exit / Badi F-47 & F-59

Dear Experts,

When i save in the tcodes F-47 and F-58, i need to display a custom pop up screen (this screen will be a z screen which i will call during the processing in the user exit / badi ).

I need a userexit / badi which gets triggered on clicking of the save button.This user exit / badi should be after all the checks in the save.

So can anyone tell me the appropriate user exit/ badi.

Kind Regards

Sajid