Visa Bulletin for DV - 2015 Lottery winners.
Visa Bulletin is published by the U.S State department for the benefit of the American visa applicants and the diversity visa lottery winners. The Visa Bulletin is useful for both the winners in overseas and those who are living in the America. These pages usually carry the advanced notice for the case numbers which are going to be current in the coming months along with the cut out numbers for the winners of the green card lottery winners each month. This is provided as a monthly guide for those who had applied for the American visa. In this visa bulletin there is a part for the Green card lottery winners who are selected and had submitted their application forms for the U.S Immigration visas. By this those DV -2015 winners can determine when their case numbers are ready for the interviews and ready or to apply to change their current U.S status to the LPR status, while they are living in the U.S.A.
In the bulletin section some of the African countries used to have special notifications for their country winners while others will have the case numbers in their own region section.
So if you are selected as a greencard lottery winner, you must check the visa bulletin from the months of September till you get your case number in the current position or "CURRENT". If your case number is not announced and your region comes to CURRENT status, it means that the available visas are exhausted and you have to try your luck again in the coming random name selection program.