It depends on the school. Dual-enrollment often does not count as entering college to the eyes of admissions committees. However, if you enter in a full-time degree program, you may be required to apply as a transfer student.

http://admission.universityofcalifornia.edu/transfer/index.h...

> You're a transfer student if you enrolled in a regular session (fall, winter or spring) at a college or university after high school. (Taking a class or two during the summer term immediately following high school graduation doesn’t make you a transfer student.)

https://admission.stanford.edu/apply/transfer/credit.html

> Students who have enrolled either full-time or as a degree-seeking student after leaving high school or through an early college entrance program must apply for transfer admission.