Can I convert my business visit visa to tourist visa from inside Canada

[Abed Ali]

Dear Experts

I would like to know following point, please help me out.

1. Currently I'm holding business visit visa and arrived to Canada, can I change my status from business visit visa to tourist visa from inside Canada.
Or currently my wife is studying in Canada ,can I convert my business visit visa to dependent on my wife.

Please guide me what is best way for me

Regards
Abed