OVS IN WEBDYNPRO ABAP

Hi Expert,

I am working on webdynpro abap ovs,i need some information regarding ovs.

I have three field on ovs  example EMPID, EMPNAME AND COMPANY

Now in my requirement i need COMPANY as READONLY on OVS..

And one more i need to write some code on RESET ACTION on OVS .

Please provide required information.

Waiting for Reply. 

Thanks & Regards,

Krishna