workflow function modules

I have a problem in my workflow email

creator submitted a request to approver through workflow.

work flow needs to send an email to approver that part is working fine for me.if request approved or rejected workflow needs to send an email to creator that part is not working for me.

is there any function module or class to send email to creator if something is there please let me know.

Thanks,

Message was edited by: priya katragadda