Does anyone know the laws in Michigan on Adoption?

I have 3 granddaughters that have been adopted It happened approx 7 or 8 yrs ago My oldest Granddaughter would be 14 then 13 and 10 I was wondering if anyone can answer questions or would know of a site that I could get answers on Grandparents rights As I was denied any rights to see the girls and since they have been adopted I have divorced my ex and my daughter that had the kids has had no contact either with the girls I dont care if she has I would just like to see them if at all possible as I really did no wrong It was because of my Daughters poor house keeping and physical abuse that she lost them Plus my ex was abusive to me and my children So I was denied contact by being with him. I am on a fixed income Disability so dont know who to turn to to find out answers PLEASE HELP ME A LOST LOVED GRANDMA I cry all the time and want to see them and I am sure that the girls want to see me also They are still in our area But I am not sure if I can visit them As I have had no contact since Jan of 2002. And really dont know whom to turn to get answers