Event handling for standard save button in RFx srm portal

Hi experts ,

I am running RFx document in srm portal.when the standard save button is cliked need to validate custom fields data and should trigger error message or success message depending on the entered data.

So please suggest me where should i write my code in backend and what are the classes triggered for saving RFx.

Regards,

Praveen

Edited by: praveen89 on Mar 5, 2011 4:42 PM