Can I set verbosity level in Petsc?

[Zhifeng Sheng]

Dear all

I uses Petsc in my programme and My programme also takes some arguments.

The arguments are first treated by my programme and then past to Petsc 
whenever needed.  So when the Petsc terminated, it would always warn me 
about some Options that are used (these options have been treated by my 
code)....

Can I set the verbosity level of Petsc and get ride of these warnings?

Thanks
Best regards
Zhifeng Sheng