Since you can provide evidence that the man in Canada is your spouse's uncle (brother of her mother/father, not cousin, only BROTHER), you will earn 5 pints for Adaptability selection factor.
Follow this link to the six selection factors: http://www.cic.gc.ca/english/immigrate/skilled/apply-factors.asp and read more about it.
and this link for the self-assessment test: http://www.cic.gc.ca/english/immigrate/skilled/assess/index.asp
My advice to you is to read ALL about immigration in the website.