Extend Visitor Visa for my Parents

Hello,

Can you advice if we can and how to extend visitor visa for my parents, they are in Canada for almost three months

We are permanent residents in Canada, and I can support them.

Also we are here for more then 4 years.

Thank you.

Regards,

Hi

The information and forms are here: http://www.cic.gc.ca/english/visit/extend/visa.asp

PMM