[GRASS-user] How to do vector elaboration only in active region

[Silvia Franceschi]

Hi all,
I am trying to use some vector operations in GRASS.
I can not understand what I am missing but it happens to me that the 
vector commands works on all the vector data instead of working only in 
the active region. I am wrong or is it so, and if so is there in GRASS 
the possibility to create a new vector data cropping the original one on 
the active region?

Thanks in advance for help

Silvia