Introduction - If you have any usage issues, please Google them yourself
There are many ways to achieve asynchronous I/O, its information on the different classifications in general are not all the same, the principle are similar, here I Asynchronous I/O method is divided into 3 categories, for this article 3 methods are discussed in detail. (1) overlapped I/O (2) Asynchronous Procedure Call (APC), the expansion of I/O (3) the use of the completion port (IOCP)