how to lock a transaction code in a report ?

Dear Abapers ,

i had a requirement to lock a transaction code in my Module pool programming . the requirement goes in this way ..

" if a single user is editing a report then that particular report has to be accesseble to only that concerned user , it cant be accessed to any other user who gonna run the report unless the first user exits the report . <removed>.

Thanks & Regards,

Sravani . Y .

Edited by: Thomas Zloch on Apr 5, 2010 8:39 PM