Creating triggers and Stored proceedures

Thanks! but it gives this error message

Msg 208, Level 16, State 6, Procedure trg_AvoidPKDeletion, Line 1

Invalid object name 'trg_AvoidPKDeletion'.

Once I execute this code, I shouldn't be able to delete any emp_id from the table by going to it's edit option. that's what done by this trigger right?