How to change User status of an WC Application when Usage has been changed

Hi Experts,

I am new to enhancements, I got a requirement as explained below. Please help me.

My functional consultant has added three User statuses (check boxes) for WCA application in WCTL lets say (Test, Permit and Rosh).

Now my requirement is as follows, When the usage of an application is changed in WCTL the User Status (check box added newly) in the Status screen has to be checked automatically. As of now the user will select the User status manually coming into Status screen.

Example, If application usage is changing from ROSH to TEST, the user status ROSH has to be unchecked and TEST has to be checked automatically.

I have tried by keeping break point in CL_EXITHANDLER class, but nothing triggers there.

Please help me, How to achieve this?

Thanks in Advance.

- Vijay