The Cambridge International Diploma in Business is at two levels: Standard (at the level of 16 year olds in British schools) and Advanced (at the level of a British 'A' level). I think that you could not get into an undergraduate programme with it alone.

Thanks Mr.duncan for your reply ...by the way i was an I.G.C.S.E student...but i didnt take business studies during school.
Thats why I was asking about Cambridge Business diploma because here in my country Egypt, they look at this diploma that it is a postgraduate study ....thats why i was very confused...

See, Standard Level is ideal if you are a student but are considering to work after your study, or if you are already employed in a junior to intermediate position. Standard Level will develop and assess your skills and competence. Advanced Level Diploma is more suitable for senior supervisors and general managers. At Advanced Level, you are expected to build on this knowledge by extending your understanding of business in order to comment on different business situations and offer a range of solutions to problems faced by business. This involves a more analytical approach to business.