Need to call WD ABAP application as popup on clicking a button in mail

Dear All,

I could not find a way of opening a WDA application itself as a initial pop up when user clicks on a button in the mail.

Basically, the user gets an approve button in mail and when he clicks on it, I plan to execute logic in WDA application and show him final message in a tiny popup saying it is approved. I dont wnat any intermediate popup when the processing is going on.

Anyways this can be achieved in WDA without using BSP. Please help

Regards,

raghavendra