I am using my laptop and i am mining with an nvidia gtx 880 and the progrm i am using is GUIminer
Please don't!
Bitcoin mining with anything other than specialized mining hardware is absolutely hopeless! Laptops in particular are not built for constant full-power operation and might wear down pretty quickly.
You might just as well use your laptop as a shovel to dig up sand on the beach searching for dropped coins; that will probably generate more revenue.
The time of mining bitcoins with commodity hardware is over, and it won't come back.
Onkel Paul
That's not entirely true.
When we finally reach the end of the rewards period for Bitcoin. It will not be cost effective to run bitcoin mining farms in the MW or TH/s / PH/s so you will see the difficulty lower astronomically and the return of hobby miners or maybe even just those who are doing it with whatever they have to be able to continue to allow for a strong bitcoin economy.
But I digress that time is far from now and I do not suggest using anything other than an ASIC to mine bitcoins and even that is going to prove troublesome if you have not ROI'd yet your ROI term is 100+days with new equipment and used alike.