EREC-Restrict external candidate when reapplying for job based on applstats

Dear Experts,

when external candidates search for jobs and they can apply.

if again he wants to apply for the same job posting, i need to restrict them based on the application status.

if status is 'rejected', need to through message and restrict to not to apply for the same job. he can apply for another job.

if application status is 1 or 2 or 3 or 4 , have to through popup message.

i have created an enhancement for APPLY_FOR_JOB METHOD Iin component controller of HRRCF_C_SEARCH_UI .

i was strucked up how to display those messages based on status ISTAT of HRP1001.

is it right path or can anybody throw some light on this please.

regards,