mail send automatically while error occur in user exit

Dear experts,

My requirement is i have user exit for vf01 invoice preparation, in that i have to check credit limit for

user. The invoice value increase credit limit i will through error msg. it working fine but my functional need mail to one particular mail id. pls guide me how to send mail after error msg.

Thanks & Regards

G.Vendhan

Edited by: vendhan g on Mar 25, 2010 4:34 AM