Dear, Walid El merchichi,My name is Andrew...

You must make an appointment to obtain an immigration visa by sending an e-mail to the immigration department at the US embassy in your resident country, and informing them with your nationality and place of residence, that you want to first get your immigration visa to America. You shall fill out the form in your name and your spouse's name, and the other will be a burden for your relatives who are US passport holders, as well as for children under 18 years.
Note that if the Green Card is requested for the husband or wife it is required to bring the marriage contract, with the translation of the marriage contract from an accredited translation office in English, but preferably the offices accredited to the US Embassy, with the following documents :
two personal pictures and the size must be 5 * 5  of the applicant, the owner of the US passport,
 Attach a copy of the passport of the applicant, as well as the owner of the US passport with the original to see if it is valid for at least six months, 
affidavit card and a copy of it 
family identity card and a copy of them and preferably translated into English, in the case of children the same requirements as the previous, 
 
**The payment of the fees is determined by the US Embassy, note that the interview is about the purpose of migration and therefore the purpose of obtaining the green card, the procedure in the first phase is almost ten days to give you approval or rejection, note that for the holder of US passport who wants to apply for you shall be with the national security number, which is called social security number, and without it  the visa will not be issued "immigration visa"
 
After completing the payment of the fees you have to go to the FedEx office, and pay in advance the amount to send papers to the Immigration Section in the second stage, you must tell the Immigration Department that you want to send the papers through them in the second phase, if approved for the first stage and the name (package 1) , We then come to the second stage and call them with (package3) will be sent  application you Ds-230 part1
 
 This is special to the applicant, with the request to fill the form I-864, and you fill the form and then printed and this is special tax and who will sponsor or sponsor the applicant, Request a certificate from the criminal evidence of the applicant to be free of criminal precedents for the applicant, and translated by the offices accredited to the US Embassy and this is especially for those whose older than  16 years, whether a husband or wife or children or parents, a certificate from the military status, note that the duration of the procedure in the second option takes about a week to ten days.
 
 For the third and final option, called the package 4, an appointment will be sent to the consulate to meet with the US consulate, the medical statement will be sent to the accredited hospitals, the applicant will be sent Ds-230 part2. English
, The applicant's birth certificate, a copy of which will be requested and translated in English, will be accompanied by a single photo of the applicant. The applicant will be asked to send the required documents one week before to the date of the interview. 
 
The second phase
, And when you arrive to the interview date must be with you all the assets of the ID card and family card and birth certificate and passport of the applicant and passport and the US passport and preferably with personal photos, with payment of fees determined by the Embassy, and you will be asked to wait for the Consul to meet him again. The visa will be issued and sent via FedEx, and you will be given a large envelope to be delivered for immigration when you arrive at the airport in America, and for children under  eighteen years are entitled to extract a passport. Then you will given a receipt to the immigration department at the airport in America. When you go there about a month later, the green card will be sent to you, and the children under the age of 18 you Once you arrive, you will be given an American passport and you will have a birth certificate, personal photos and fees , but finally you must give up residence in any country because you have to stay in America continuously