Function module to read error message provided message class and mssg no.

Hi experts,

I am trying to populate my database table with the error message.

The error message as comming form standard code in an ITAB.

I am getting the error class and message number.

Can any body please tell me any function module to read the error.

Or is there any way to populate the database table with the error message.

Regards,

Sandipan.