Habibaelgindy, you are posting a lot of questions. If you want the volunteer helpers here to give up their free time to assist you, please:
1. take the time to formulate your request in standard English. Wipeter has given you a good example. 2. give your threads a title that gives is some information about your questions. The endless 'error?', 'difference?' and 'A or B?' tell us noth